Actor Shipping: Happens a fair bit, as with any fandom this massive. One example is the pairing of Elizabeth Olsen and Sebastian Stan (Olstan), which almost seems more popular than shipping their fictional counterparts (Winterwitch).
Marvel Comics itself is still widely known and influential thanks to its eight-decade-long history, and the movies have been a Gateway Series to reading their books, to an extent. But the MCU films are even better-known and earn way more than the comics do.
Since the MCU is now a Long Runner franchise spanning over a decade, some of its elements have become so well-known and entrenched in the minds of its fans that it may overshadow their comic counterparts, even influencing them. For instance:
The Infinity Stones have become so central to the MCU's Myth Arc that it's likely that only Marvel Comics fans who knew of them before the movies may still refer to them as Infinity Gems.
Similarly, James Rhodes' nickname in the comics was Jim, not Rhodey (as reflected by the 90s Iron Man cartoon), until the latter carried over from the movies, so only older fans are likely to still call him Jim at this point.
Tony Stark's snarky personality in the movies has become his default one in other adaptations ever since and has carried over to the comics as well.
No superhero crossover film had ever been done beforenote at least for American superheroes, and Marvel's biggestsuperheroes were in the hands of other studios. All they had were mostly B-listers. Even the Nick Fury stinger at the end of Iron Man was inserted mostly then as a Mythology Gag. Great idea in hindsight, though, right? In fact, because of the MCU (especially The Avengers), said B-listers were elevated to near-Spider-Man status.
This has also affected some of the films released since the Avengers. A film based on the Guardians of the Galaxy, with characters obscure even to Marvel fans, and a film based on the much-mocked Ant-Man — especially in light of its well-publicized Troubled Production — were written off as potential flops by most outlets. And yet they were both successful, outdoing expectations rather significantly. Moral of the story: Dont bet against the House of Ideas. Or the House of Mouse.
Arc Fatigue: Thanos' story in Phase 1 and Phase 2 consists of him sending flunkies to bring him Infinity Stones, which ultimately causes him to lose one of the Infinity Stones he already had, along with those he nearly gained. He also does not get a lot of characterization with his few appearances in these parts, coming across as a Generic Doomsday Villain. This was rectified in Phase 3, in which he takes a hands-on approach to the situation and his motivations are explained. Related to this trope, Thanos' surprise appearance at the end of The Avengers was mind-blowing to comic book fans and intriguing to general audiences. By the time he shows up again in the post-credits scene for Age of Ultron, viewers are more likely to roll their eyes.
Audience-Coloring Adaptation: A complaint from the more hardcore comic book readers was that the success of the MCU is causing narrative and appearance shifts to the source material so that it could cash in on the success of the MCU. Not only that, the Fantastic Four and X-Men were often put aside in Crisis Crossovers post-2012 due to not being part of it.
Award Snub: Despite most of the franchise being extremely well-received by critics and fans, they don't do so well with the Academy Awards. Only one MCU film has gotten a Best Picture nomination, Black Panther, and it didn't win. While Black Panther had seven nominations and won three (Best Original Score, Best Costume Design, Best Production Design), most other MCU films get one or two nominations (if any), usually for Best Visual Effects, and none of them have won. The Academy announced they were considering a new award in 2018, "Outstanding Achievement in Popular Film", which earned them scorn for being perceived as a case of We're Still Relevant, Dammit! and a consolation prize to acknowledge the MCU without letting it have Best Picture, especially since 2018 was the year of Black Panther. That award wasn't actually created, largely due to the backlash.
Iron Man is the biggest firestorm of the MCU. At first he was incredibly well-received due to Robert Downey Jr.'s snarky and often ad-libbed performance to the point that the actor underwent a Career Resurrection, and it revived the character's flagging reputation in the comics as he had been in the middle of a Dork Age. But over time the same traits that made him so popular also earned him a lot of Hype Backlash, and now the mere mention of him is an easy way to start passionate arguments.
The first lynchpin of debate revolves around his Byronic Hero characterization and subsequent perception as a Jerkass Woobie. His fans find his snark and ego awesome and believe that his Woobie side dominates. They point to his sad backstory, his genuine desire to do good, and the fact that nobody else is a greater critic of him than his own self. They believe that his detractors are too harsh on him, and that the other characters don't give him enough respect, noting that whatever wrongdoings he's guilty of, healwaystries to do the right thing in the end (and sometimes pointing out that a lot of them may not necessarily even be his fault). Critics find his snark and ego insufferable and believe that his Jerkass side dominates. They point to his selfish and arrogant "techbro" personality, how all the conflicts of the movies he appears are in some way tied back to him or his company, and that other characters who are guilty of subjectively less wrongdoing are punished more harshly than him. They believe that his defenders tend to downplay these aspects or blame others for them, and note that even if he's not entirely responsible for the conflicts he starts, that he nevertheless has a frustrating tendency to exacerbate them with his actions (or in some cases, inaction.)
The second lynchpin of debate deals with his Spotlight-Stealing Squad treatment and the MCU's tendency to subject him to Wolverine Publicity to the point that he overshadows Captain America as the main or lead Avenger. His fans love his expanded prominence and believe that he's such a fun character that it's justified (movies where he appears are big box-office draws), and that the MCU's tendency to use him for Adaptation Origin Connection streamlines continuity. Others see his increased screentime as favoritism that parasitizes off other characters' roles and contributions* For example creating Ultron in place of Hank Pym, being part of the origin stories of Vulture and Mysterio, his heavy role in Civil War which many viewers felt came at the expense of development for Cap himself or his supporting cast, or becoming a mentor and parental substitute of sorts for Spider-Man at the expense of a stronger presence for Uncle Ben, who has yet to be mentioned by name. In addition other MCU characters were seen to be increasingly snarky like him (or Spider-Man), giving them and the movies something of a "same-y" feel according to these detractors. The ending of Avengers: Endgamein which he sacrifices his life to stop Thanos for good, becoming the ultimate savior of the universe, and receives a grandiose funeral at the end, ensured these debates would never end even after his death, as one side believes that it's poetic justice for the character who helped kickstart the MCU, while others view it as the franchise enshrining his Character Shilling and making it so that the universe continues to revolve around him posthumously, particularly since Black Widow, another founding Avenger, also sacrificed herself and didn't receive a fraction of the acknowledgement, with the in-universe justification being seen as a Hand Wave double standard.
Wanda Maximoff. Her detractors see her as an unhinged psycho who gets away with scathing amounts of damage, such as deliberately unleashing the Hulk on a rampage and being indirectly responsible for Tony creating Ultron and thus all the people who later died (including her own brother and Zemo's family). They argue that her reasons for trying to kill Tony are spurious and that she never took responsibility for Ultron, thus her membership in the New Avengers makes her a galling Karma Houdini when characters like Tony and Loki get more flak in-universe for less. Her defenders consider her a deeply sympathetic Jerkass Woobie whose troubled and traumatic upbringing make it difficult to ascertain just how fully conscious she was of the consequences for her actions, that the death of her beloved brother at Ultron's hands was her karmic punishment, and that her HeelFace Turn and subsequent work for the Avengers was her way of doing redemption for her past crimes. Unsurprisingly, given Tony's own base-breaking status and the ties between his backstory and Wanda's, opinions on the two are often heavily intertwined, with Tony fans often being Wanda haters, Wanda fans being Tony haters, and vice versa.
Steve Rogers zig-zagged into this from Civil War onward. Once again, opinions on the above two base-breakers also affect opinions of Steve, with Tony fans despising Steve and vice versa (especially from Phase 3 onward), while Wanda fans and Steve fans tend to go hand-in-hand.
Initially Steve was moderately divisive in the first two phases due to an acute case of Depending on the Writer. The Captain America films characterized him as firmly on the "Good" side of To Be Lawful or Good, frequently challenging authority and standing up against oppressive rules to do the right thing. Meanwhile his portrayal in the first two Avengers movies is the complete opposite, earning him a large camp of detractors who see him as a stodgy Lawful StupidJerkass. As a result, fans of Steve's solo films tended to view him the most sympathetically while fans who only knew him from the first two Avengers films tended to be his most vocal critics.
Civil War, which was deliberately meant to show Steve's more complicated side, opened the floodgates due to Steve choosing to side with his childhood friend Bucky Barnes over his current friend Tony, as well as the revelation that he kept the truth of Bucky having assassinated Tony's parents under mind control from him, leading to the dissolution of the Avengers. Haters consider Steve's behavior to Tony a betrayal of their friendship and unforgivably hypocritical for resisting the Accords after criticizing SHIELD's lack of oversight in The Winter Soldier. Defenders argue that Steve's opposition to the Accords is logically consistent given the events of The Winter Soldier justified his cynicism about regulation being extremely dangerous in the hands of evil men like Ross, and that pinning the blame entirely on Steve for splitting the Avengers is ridiculous considering he wasn't even sure about Bucky's involvement, validated when Infinity War establishes that Tony is equally culpable for refusing to reconcile after Steve gave him the option to.
Avengers Endgame and onward brought Steve back into base-breaking territory for good, with portions of the Peggy, Bucky, Sam, and Sharon fandoms also out for his blood after his extremely controversial ending there, elaborated in more detail on the work's own page. Ironically, opinions on Steve's ending in Endgame tend to run in the opposite direction as expected, with it being one of the few things Tony fans who otherwise hate the character approve of, and conversely, many of Steve's supporters do not defend it, instead treating his depiction in that film as a form of derailment and the kind of exception that proves the rule regarding his previous actions.
In Iron Man 3, the depiction of the Mandarin, Iron Man's Asian magic-using Fu Manchu-esque archfoe, was so divisive that a short film, All Hail the King, was made to address fan complaints about the Mandarin being a sham devised by the real villain, a white guy who is the "true" Mandarin and reassure them that yes, the traditional one exists, though he has yet to be shown onscreen. His depiction in Iron Man 3 was divisive because of the character's nature in the comics in relation to modern times and the approach to adapting it. Some thought it was a brilliant subversion, while for others it changed too many core elements needlessly, feeling that a depiction that was both more nuanced and sensitive and closer to the source material could have been hammered out if the writers had tried.
Darcy Lewis from the Thor films is very polarizing. Either she's one of the funniest MCU characters or she's downright annoying.
While the conflict itself was primarily limited to Captain America: Civil War itself, the film nevertheless divided the fandom between those who side more with Captain America and those who side more with Iron Man, with the two characters' appearances in future films as well as from those who sided with them being used as ammunition for continued debate. Many people who sided with one character still refuse to forgive the other and will subsequently subject their later actions to Ron the Death Eater as a result in fanworks and otherwise.
The long-standing debate on whether or not the shows produced by Marvel TV should be considered canonical to the movies or not. The majority of the shows have their fans, with Inhumans being the only real exception, but the decreasing amount of synergy with the films over time led some fans to question if Jeph Loeb's repeated claims that "It's all connected!" actually held water or not. note The shows initially had some high-profile talent from the movies involved, but that largely stopped being the case with Marvel Studios's creative emancipation from parent company Marvel Entertainment, which happened in the middle of 2015 and didn't catch up with the shows until 2016. A common defense at the time was that, since the shows covered different portions of the Marvel Universe than the movies, massive crossovers weren't needed, even though they could happen eventually. While fans were thrown a bone with Avengers: Endgame featuring a cameo from James D'Arcy as Edwin Jarvis, others were quick to point out that this is the only direct reference to the shows across 22 movies, and it was with the sole Marvel TV project that Kevin Feige produced. Things were further thrown into question with the last few seasons of Agents of S.H.I.E.L.D., which used a much different form of time travel than what was established in Endgame, while the sixth season had an unavoidably massive Continuity Snarl that ignored the ending of Avengers: Infinity War (in spite of the last few episodes of the fifth season explicitly referencing Thanos's invasion). With Feige taking over for Loeb in 2019, and promoting the Disney+ series as being equally-important to the films of the series (while not doing the same for any of the previous shows), it seems entirely possible that most of Marvel TV's output will fall under Canon Discontinuity in favor of establishing new takes on the characters that the shows adapted — but since Feige has yet to retract his past direct statements that the old shows do inhabit the same continuity as the film's, that hasn't stopped fans from arguing that the shows are still canon.
To an extent, the franchise's Lighter and Softer tone has come under more scrutiny. While the "fun" atmosphere is still beloved by most viewers, there's been an increasing backlash to the "Marvel formula" among certain circles, with critics feeling that the lighthearted tone ends up undercutting any kind of drama or stakes and leaves any heavier moments as ringing hollow.
Can't Un-Hear It: Given how the MCU is more or less the Marvel Universe brought to life, there are many, many, many instances where the actors' voices can be heard when reading the comics:
Daredevil (2015): Charlie Cox's well-acclaimed portrayal of Matt Murdock has caused many to automatically imagine his voice whenever they are reading his adventures. Likewise, with Karen Page and Foggy Nelson, it's often hard to not imagine hearing Deborah Ann Woll's and Elden Henson's voices.
This article warns that this trope might happen to the franchise if it expands itself too much too quickly.
Hawkeye's appearance in Thor. Non-comic fans are left clueless why the movie spent five minutes bringing in a big name actor to play a random wisecracking guy with a bow and arrow, who never appears in the film again, though this made sense when The Avengers came out.
It's possible to enjoy The Avengers if you haven't seen all the individual movies beforehand, as long as you've got a rough idea of who everyone is (e.g. Steve is a Fish out of Temporal Water, Thor is a Norse god with an almighty hammer, etc.), but if you want the backstory of each character you'll have to watch five other movies.
During production on Avengers: Age of Ultron, Joss Whedon said that he wanted to make sure it was accessible enough that it could be understood even if you'd only ever seen the previous Avengers movie. This proved to not be the case, as there are cameos (some of which are very relevant to the plot) from characters that had previously only ever appeared in non-Avengers films, and a key plot point involving the Infinity Stones really only makes sense if you've seen Thor: The Dark World and Guardians of the Galaxy.
Prior to the release of Captain America: Civil War, The Russo Brothers stated that they'd made the film on the assumption that most of the audience had already seen the previous Marvel movies. It shows. The movie is virtually incomprehensible unless you've not only seen the previoustwoCaptain America movies (though that should be obvious since they're in the same series), but the previously mentioned Age of Ultron as well. Certain key scenes also rely on the audience having knowledge of Iron Man 3, Ant-Man and The Avengers. In an example of Tropes Are Not Bad, many critics and fans praised the way the film applied this trope to Spider-Man. The movie doesn't explain his origin or reveal too much about his backstory, as there was an unspoken assumption that most of the audience already knew the character from any of his previous five movies or numerous TV shows.
Quite a number of things in Thor: Ragnarok will make more sense if you've watched the previous Thor movies and Avengers: Age of Ultron beforehand. Otherwise, you won't really understand why Thor and Loki's relationship unfolds as it does in the movie and Bruce Banner's own subplot in the movie.
Avengers: Infinity War broadly assumes that the viewer has seen all of the previous MCU films, as it's chockful of nods and references to prior incidents in the timeline. However, it most specifically requires that the viewer has seen the previous Avengers films (to know that Thanos is involved as the series' Big Bad), the first Guardians of the Galaxy (as the main team and the Collector are present), Captain America: Civil War (as Infinity War begins with several team members on the lam after being broken out of The Raft at the of the previous film, and heavily involves Spider-Man and Black Panther who were introduced in that movie), Thor: Ragnarok (which explains why Thor, Loki and Hulk are on the Asgardian ship) and Black Panther (which sets up Wakanda, the setting for the film's climax).
Avengers: Endgame takes this even further, as it requires that the viewer is familiar with the two films that came out in between it and Infinity War, Ant-Man and the Wasp and Captain Marvel (2019), on top of having to know about every other film that came before both, especially because the film has the characters time-travelling to various points in their history, such as to the climatic battle of The Avengers and the beginning of Guardians of the Galaxy, and the final battle at the end has every surviving ally and supporting cast of the Avengers show up to help them fight Thanos and his forces (which also include within their ranks the several different races shown in prior films). And as demonstrated when someone who hadn't seen any of the past movies writes his impressions, characters are rarely even called by their names\codenames, so it's pretty clear the movie expects you to know everyone who shows up on screen.
Happens in the trailer for Captain Marvel (2019), which features a scene of Carol punching an old woman on a bus with absolutely zero context. Comic book fans and people who've been following the movie automatically assumed the woman was a Skrull (an evil race of aliens capable of shape-shifting) despite the fact that the trailer doesn't even mention them. It took until the second trailer for the Skrulls to show up and the woman to be shown fighting back against Carol.
This is the general explanation for why none of the characters from the present day TV shows (Agents of S.H.I.E.L.D., Daredevil (2015), Jessica Jones (2015), Luke Cage (2016) and Iron Fist (2017)) appear in the movies, even the ones involving Crisis Crossovers. The movies generally have a wider audience than the TV shows (and are released in certain countries where the shows don't even air), and the creators don't want to have to spend time explaining who the hell these people are for the benefit of audience members who might not be familiar with them. Though Edwin Jarvis from Agent Carter appears in Endgame, if only because there's a past justification (Tony's virtual butler in the other movies had to be named after someone!) and a production one (that series was created by the ones who wrote the Captain America movies and then the third and fourth Avengers, so it's their character in a way).
Kevin Feige gets a lot of this from fans, some arguing that he's doing a better job with these characters than the comic writers themselves are.
Joss Whedon as well for the first two Avengers movies and his involvement with the franchise as a whole, but that's par for the course for Whedon. While he did get a bit of flak for Age of Ultron after its release, the subsequent reveal that most of the film's problems were the result of Executive Meddling by the infamous Creative Committee vindicated him.
Loki, a villain of three films, is adored by a certain section of the fanbase. This has been acknowledged by Tom Hiddleston, who appeared in character at a convention and immediately had the entire room cheering for him. "It appears that I have an army."
Thanos in Avengers: Infinity War is given more depth than a typical MCU villain as he garners a large amount of sympathy and has a noble goal of trying to prevent an overpopulation crisis that would doom the universe. But many people still forget that regardless of his motivations and backstory, Thanos is still a genocidal madman whose ultimate plans involves killing half of the population of the universe as soon as he possesses the means to do so. In particular, they offer him a lot of sympathy because he's sad after Gamora dies, completely ignoring the fact that he himself willingly sacrificed her for power. Then there's the fact that his ultimate plan of depopulation is scientifically unsound and logically unsound, which would only cause needless deaths, and with the Infinity Gauntlet he could do literally anything else to solve overpopulation, yet stuck to his plan of murdering half a universe.
Ending Fatigue: Barring Daredevil Season 1, every season of the franchise's Netflix shows has been accused of not having enough story to fill their thirteen episodes, resulting in a good first half followed by the second half dragging as the characters run around not accomplishing much until the running time is filled. The news that The Defenders would be only eight episodes was met with a lot of relief, though there are still those arguing that with its having to juggle four heroes and all their supporting casts, a larger episode count would be far more reasonable.
Clark Gregg himself endorses the theory that Coulson is actually his character FBI Special Agent Michael Casper from The West Wing, having taken a new identity upon being recruited by S.H.I.E.L.D.
A popular, half-joking theory is that Stan Lee's recurring cameos are actually the MCU version of Uatu the Watcher, taking a human form/avatar to observe the events of the films. Part of this eventually became Ascended Fanon with Guardians of the Galaxy Vol. 2, where he informs the Watchers, although the big guy himself is portrayed by Jeffrey Wright.
Fandom-Enraging Misconception: Hardcore fans get very irritated when people mistake a superhero film as part of the MCU just because it stars a Marvel character. No, the X-Men Film Series and Spider-Man Trilogy are not part of the Marvel Cinematic Universe, as they are in different continuities and were made by Fox and Sony, respectively. Venom (2018) actively attempted to fool audiences into thinking this, to the ire of MCU fans, which Sony continued to do with the first trailer for Morbius (2022).
With Marvel movies not made by Marvel Studios, such as Sony's The Amazing Spider-Man Series and Fox's X-Men Film Series. A lot of MCU fans wish these franchises would revert to Marvel, and films made after Iron Man, like The Amazing Spider-Man and X-Men: First Class are often dismissed as cash grabs made to keep the rights from Marvel Studios. Conversely, some argue that Fox's movies work better than Marvel's in-house movies (a phenomenon referred to as "Foxholm Syndrome" by MCU fans). For a while, the Fox-Marvel and MCU rivalry also extended to Fox's attempt to reboot the Fantastic Fournote not helping Fox is that they had already adapted the Four twice in the hands of Director Tim Story, and both movies he directed are widely seen as subpar at best but after the reboot in question was critically panned, many Fox-Marvel fans found themselves agreeing with MCU Fans that the Four would fair better in Marvel's hands.
Some fans hold particular venom for the eponymous film, deriding it as Sony's attempt to ride the coattails of the MCU by making their own comic cinematic universe. The trailer for Sony's Morbius (2022) blatantly attempting to convince people it was set in the MCU resulted in many calling out Sony for the obvious marketing deception, even if some seemed to buy it in some way.
With the Arrowverse, though this is mostly restricted to the MCU TV shows such as Agents of S.H.I.E.L.D. and the Netflix MCU, but nonetheless still keeps the Marvel/DC rivalry burning strong. This is especially the case with Arrow which has a similar Darker and Edgier feel to most of the Netflix shows. Made worse when the Marvel TV shows were cancelled to avoid competition for Disney+ shows.
Fanon Discontinuity: While the TV and streaming shows are officially stated to be 100% connected to the movies, a segment of fans would just rather take most or all of them as "non-canonical unless noted otherwise" - not necessarily because the shows are bad (rather, in general the shows are well-received, though Iron Fist and Inhumans infamously broke the "Fresh" or higher Rotten Tomatoes streak the franchise had enjoyed), but because the movies barely acknowledge anything from the shows, although the shows reference the movies. A larger group generally views them as an Expanded Universe; canon to the movies and expanding on the world and lore, but non-essential within the overall story.
In general, the TV Shows are produced by different verticals than the MCU proper. Kevin Feige from Phase 3 onward negotiated MCU being directly under Disney rather than Marvel Entertainment, who cover most of the TV shows. The only exception is Agent Carter which was more tightly linked to the MCU and fittingly is the only one to cross-over, with the original Jarvis from Agent Carter appearing in Avengers: Endgame. The logistics of TV and movie production make it hard to coordinate storylines due to the demands of marketing and promotion (i.e. protecting spoilers) and the creative instincts of filmmakers (notably the HYDRA reveal from The Winter Soldier was decided by the Russos, as a bold status-quo shift that Agents of S.H.I.E.L.D. had to incorporate, having never been conceived to go in that direction from the start).
While the Netflix shows like Daredevil are mostly acclaimed, a segment of fans take their canon status into question as a result of their cancellation and imminent removal from Netflix just as Disney launched its own streaming service, which will produce its own MCU shows with the movie characters. The darker and more violent nature of these Netflix shows in contrast to even the darkest parts of the movies have also made some fans mentally file them as either "non-canonical unless noted otherwise" or "canonical, but mostly by virtue of not being contradicted". Most fans of these Netflix shows agree that they work better as Expanded Universe self-contained works, seeing it as a respite from the interconnected nature of the MCU which later came under fire for the way everything either ties into the Avengers or Tony Stark's corner, and the street-level nature of these shows have more credibility with as few references to the wider-verse as possible.
This actually ended up getting canonically enforced with Season 6 of Agents, as no one from the film side of the franchise bothered to inform the show's crew that Endgame was going to move the series five years into the future, resulting in the season supposedly being set in the middle of the five years the population was halved but making absolutely no reference to it, creating a Continuity Snarl where you have to just either treat season six of the show as a full-fledged Alternate Continuity or do some very careful Fanon explaining of offscreen events if you want to keep watching without your head exploding.
First Installment Wins: With the exception of the Captain America films and sequels, Thor: Ragnarok, and Ant-Man and the Wasp, it's generally acknowledged that most Marvel movies lose their novelty after the first film of the run and the sequels (Iron Man 2, Iron Man 3, Thor: The Dark World) tend to be weaker. This even applies to the The Avengers where Ultron was seen as falling short of the first film, and it's contested with Guardians of the Galaxy Vol. 2 and Spider-Man: Far From Home (some see them as cases of Even Better Sequel while others don't). Some have argued that the extended universe nature of these films prevents sequels from really having stakes, and flattens it into Comic-Book Time where characters can't truly grow, change or experience Character Development significantly.
MCU fans have a much healthier relationship with fans of Deadpool than the other Marvel movies made by FOX, mostly due to how a comics-faithful, R-rated Deadpool movie would be incompatible with the (relatively) family-friendly MCU films. It doesn't hurt that Deadpool made a couple of friendly nods towards the MCU itself, has been praised by a number of the MCU's actors and directors, and even got approval and help from Kevin Feige himself. It got to the point that when Disney purchased Fox and reacquired the X-Men movie rights, Reynolds was announced to be staying in the role of Deadpool in the MCU, a decision that was universally celebrated by fans.
When it comes to Venom (2018) and its shared universe, while there are plenty of MCU fans who loathe it with a passion, there are also plenty who like it well-enough; some even think it and the rest of Sony's prospective Shared Universe of Spider-Man characters should tacitly become part of the MCU in future. It also helps that its success indicates Sony doesn't actually need to have Spider-Man in their Marvel movies to make money, and they'll be more inclined to let the MCU keep him. After the Morbius trailer was released and, coupled with comments from Feige and Sony, hinted the the MCU's version of Spider-man might become " common ground " between the two franchises, some MCU fans are actually excited at the prospect of Spider-Man developing his own expanded corner in the larger franchise.
Hugh Jackman as Wolverine has earned the respect of pretty much everyone, MCU fandom included, in spite of never wearing a comics-accurate costume. Praise for his swan song in the role cemented this. There are fan calls to recast him in the MCU now that Disney has bought FOX's film assets.
Lots of MCU fans also love Spider-Man: Into the Spider-Verse for its unique animation style and cast of fan-favorite Spider-Men such as Spider-Ham, Spider-Gwen, Spider-Man Noir, and of course Miles Morales — even in spite of widespread disdain for Sony due to their handling of the Spider-Man franchise.
In spite of the rivalry with the DCEU, there are fans who like both film series. Black Panther and Aquaman fans get along largely because their films are the first installments in both franchises to have non-white leads and directors, adding much needed diversity to the superhero genre. Likewise, Captain Marvel fans have a cordial relationship with Wonder Woman fans largely thanks to their fanbases uniting against their Girl-Show Ghetto detractors as well as the two movies' cast members and crew supporting one another (Wonder Woman director Patty Jenkins expressed excitement about the MCU's superheroine movie and Captain Marvel star Brie Larson admitted to being a big Wonder Woman fangirl growing up).
Captain America: The Winter Soldier was surprisingly popular in China partially because it showed that loving one's country isn't the same as loving one's government. Films with this theme are rare in China due to government censorship.
As a matter of fact, China loves the MCU so much that the studio has started making changes to the movies for the benefit of Chinese audiences, and sometimes even shooting extra scenes (as was the case with Iron Man 3). According to its screenwriter C. Robert Cargill, Marvel makes so much money in China that the Ancient One was changed from a Tibetan man to a Celticwoman in Doctor Strange (2016) for this exact reason, because the notoriously Tibet-sensitive Chinese censors would have never allowed a movie with a heroic Tibetan character to play at the box office there, and changing it to an Asian woman would have come across as an outdated stereotype. It's also been strongly suspected that this is why a scene in Thor: Ragnarok explicitly confirming that the blonde woman in Valkyrie's backstory was her lover (as well as one showing a woman leaving Valkyrie's room, implying they'd just had sex) was deleted from the final cut because Chinese audiences would have frowned on an explicit portrayal of homosexuality.
Ant-Man (and its 2018 sequel Ant-Man and the Wasp) are both moderately successful in their home country, but massively popular in Asian countries, especially China. The Ant-Man films are so liked there that there is now an Ant-Man and The Wasp attraction at Hong Kong Disneyland. Its the second Marvel themed attraction at the resort and will eventually be part of a Marvel-themed land set to open in 2023.
Reportedly, Chinese audiences were furious when it was announced that the first Marvel movie with an Asian lead would be a Shang-Chi film, because he was originally written as the son of Fu Manchu (even though Marvel has long since retconned out the connection). China loves the MCU so much that having the first Chinese Marvel movie character be based on a Yellow Peril stereotype was seen by them as a personal betrayal.
Genre Turning Point: The franchise as a while served as the major turning point in not only the superhero genre but for blockbuster films in general:
They are the Trope Codifier in the 21st Century for the Shared Universe. Before Iron Man and before The Avengers, the idea of a superhero team-up was considered a pipe dream among comic book fans. Earlier superhero films, despite the odd Mythology Gag and in-joke, had heroes existing in the world as the only beings of their kind, be it Batman, Superman, or even Sam Raimi's Spider-Man Trilogy and the X-Men Film Series. The MCU changed the game and The Avengers proved that a big-budget live-action superhero ensemble film could and would work and be phenomenally successful, and it wouldn't be overcrowded with too many heroes or characters. It led to a renewal and modification of the blockbuster franchise mode and it directly spurred the creation of the DC Extended Universe as well as myriadotherattemptsatasharedcontinuity in non-superhero genres.
While all the early movies were financial successes, critical reception was hit or miss outside of Iron Man and The Avengers. Things turned around big time with Captain America: The Winter Soldier, which some have even compared to The Dark Knight as one of the best superhero movies of all time and a great case of Genre-Busting the superhero movie. Every MCU movie since has gotten glowing praise, with the hiccup of Age of Ultron (which got mixed reception) and to a lesser extent Captain Marvel (which got the biggest amount of negative reviews since Age of Ultron, though still skewing positive).
Among Captain America fans, Winter Soldier was the film that forever cemented Captain America as one of the best superheroes of the modern blockbuster era. For fans, Winter Soldier manages to bring in morally complexity, gritty realism, and visceral fighting that would define the Captain America films without undermining Cap's idealism and heroic outlook.
Deliberately attempted with Thor: Ragnarok. While Thor wasn't exactly hated beforehand he also didn't make the top of many fans' favorite superhero lists either, usually considered bland compared to the other Avengers or his own brother Loki. One of director Taika Waititi's stated goals was to change this by giving Thor a much more engaging character arc this time. Most would agree that he succeeded, given that it's the best received of all the Thor films. The beard continues to grow in Avengers: Infinity War, reminding viewers why Thor is known as the god of thunder in the fight against Thanos.
Based on both Box office and Reviews, Phase 3 is widely seen as this for the MCU as a whole. An important reason frequently cited was the restructuring at Disney that remove the infamously intrusive Creative Committee from the process. Most notably, the Phase 3's Black Panther became the first movie in the franchise to win an Oscar with 3 awards for Best Costume Design, Best Production Design, and Best Original Score. Avengers: Endgame becoming the highest grossing movie of all timenote without adjusting for inflation cemented this status.
Coulson was this after his death in The Avengers. Turns out he was hiding, and it was in Tahiti. It's a magical place.
Janet van Dyne, after it was confirmed she was going to be a hero in the 60s who'd passed away, has been getting this. Fans were hoping that, instead of turning Hope van Dyne into an expy of her, they'll instead reveal that the real Jan is still trapped in the Microverse, like she was in the comics. This has also proven true after she was confirmed to appear in Ant-Man and the Wasp.
After years of being built up as the pinnacle of live-action superhero films, this set in during Phase 2. Some viewers claim the films aren't as faithful to the comics as claimed, are too similar in plot and aesthetics, and controversial cases of Executive Meddling have taken some of the luster off the studio.
While few will contest most of the Oscar nominations Black Panther got (and eventually won) for technical categories like Best Costume Design, Best Production Design, and Best Original Score, the nomination for Best Picture is seen by many fans as a blatant ploy for relevancy and attention by the Academy Awards.
For a more character-specific example, Tony Stark is the most prominent figure in the MCU for obvious reasons, and his portrayal in the films is widely credited with turning Iron Man into a beloved character and rescuing him from the Scrappy Heap the comics had dug him into. However, as time has went on he's become disliked by a significant portion of the fandom due to his popularity making him what they see as a Spotlight-Stealing Squad with a tendency to Kick the Dog due to his abrasive personality. Comic fans in particular dislike the way he's credited with the accomplishments of other major characters, particularly Hank Pym's creation of Ultron and replacing Uncle Ben as Peter's surrogate father. He's also received a lot of flak for the fact that in quitea fewof thefilms, he plays parts of varying significance in creating the conflict in the first place and rarely acknowledges it or tries to change his Control Freak tendencies so it never happens again. His role in the finale of Avengers: Endgame especially angered people who felt the franchise had gone overboard with the Character Shilling, given that his death resulted in multiple elaborate scenes of the other heroes paying him their full respects, while Black Widow, who also sacrificed her life in that film, didn't get even a fraction of the same level of acknowledgement.
The MCU Spider-Man, particularly in his own movies. While most, if not all, praise Tom Holland himself for his acting ability and endearing off-screen presence, there's been a growing trend of people who really dislike how his film version is portrayed, which is a contributing factor to Tony Stark's own Hype Backlash given Peter is written as a fanboy of Tony. Peter suffers from a major Adaptation Personality Change, going from a somewhat nerdy, insecure Everyman who appreciated other heroes and playfully idolised Captain America, but was more the loner due to being socially awkward, to instead being a more confident Extraverted Nerd who utterly adores other heroes, especially Iron Man, whom he sees as a surrogate father and spends more time grieving for than he's done for his Uncle Ben, who isn't even mentioned by name. Much of Peter's traditional canon personality is instead Informed Attribute, where we're merely told he's unpopular, poor, and not great with girls, despite having no shortage of friends, being well-liked by his classmates outside of Flash Thompson note (who inversely, is written as an effeminate classmate nobody likes whose backstory of being abused at home is reduced to a joke about being neglected), attends an expensive charter school with no indication how Aunt May pays for it, and has no trouble pursuing his love interests. However, due to the films' popularity and Tom Holland's beloved status, the films are considered and treated as the best take on Spider-Man, something that's contested by fans of the previous film franchises, the animated shows, and the comics.
Among comic fans, the franchise also gets this due to how the films have been seen as Adored by the Network compared to other depictions of the characters, film and otherwise, and how this has turned them into an Ink-Stain Adaptation. The MCU has, since around Avengers, been pushed as the definitive take on the Marvel Universe, with other film franchises based on Marvel properties (such as the Sony-produced Spider-Man franchises and Fox-produced X-Men films) being seen as inferior films, even despite many of the same problems, while other versions of the Marvel Universe (such as their animated series' or video game efforts) being cancelled for not being close enough to the films, replaced with versions that act more like commercials for the films and/or kid-friendly copies of them. This got especially controversial as the comics began to rework and adapt ideas from the films, such as repackaging characters into copies of their film counterpart, some of which required undoing years worth of well-regarded Character Development. For some fans, the MCU being treated as the only important version of the Marvel universe is a major problem, especially if you're not a fan of how they've changed something in the adaptation, given that Marvel refuse to let any other version exist.
Some felt that the Phase Two films were getting a bit formulaic. The exceptions that stand out are usually Winter Soldier and Guardians of the Galaxy, the former of which gets major praise for strong writing and being a huge Wham Episode while the latter is appreciated for being a break from all the events happening back on Earth.
Some people have claimed this about the ABC shows (both spy shows with a balance of comedy and drama, focusing primarily on non-powered individuals fighting against terror groups), and the Netflix shows (which deal with a dark Anti-Hero suffering depression with tragic backstories). The similarities are limited, but some still call foul on them.
Given the MCU's status as a Cash Cow Franchise, a lot of Marvel-related properties such as its cartoons and even the mainstream comics themselves start to emulate the MCU more and more. This drew the ire of comic book fans who are tired of Marvel's attempt to draw in new fans who are more familiar with the MCU at the cost of originality. Specific examples include Civil War II and Infinity Wars (2018), which many fans accused of being published simply to ride on the popularity of the films released the same year.
Then there's the fact that big Hollywood names like Jodie Foster, Mel Gibson, Martin Scorsese and Francis Ford Coppola have argued that MCU movies are not "real cinema" due to their commercial nature and spectacle-heavy presentation, with Scorsese describing them as being like "theme parks". It's debated whether they're worried about it limiting creativity in Hollywood, or just being elitists or envious of the franchise's success.
Launcher of a Thousand Ships: Everyone. See the main page for reasons and details. The record holder is Darcy Lewis whose reputation for this is positively memetic to the point people now go out of their way to Crack Ship her with every other character out there. Other examples include Tony Stark and Mockingbird (both of whom "specialize" in Ho Yay Shipping), Loki (who specializes in Foe Yay Shipping), Adorkable Jemma Simmons, Black Widow (due to the sheer amount of canon Ship Tease with both male and female characters), Captain America (a lot of Ho Yay - especially after Winter Soldier, being the Token Good Teammate in the Avengers, a healthy Ship Tease with Widow and the whole case with Peggy, two of the more popular heroines) and Wanda Maximoff (for being such a massive Woobie even comparing to the rest of the Avengers that people just want something goes right in her life for once).
LGBT Fanbase: While the MCU is popular with viewers of all orientations, certain characters and works in particular attract an especially strong queer following:
Agents of S.H.I.E.L.D. had some of the first canonically LGBT characters in the franchise, along with the Inhumans storyline in the later seasons having a strong Rainbow Lens in the same vein as mutants did in the comics. It got to the point that the fandom acquired its own hashtag of "#superqueeros".
The Captain America trilogy's massive gay/bi following (especially fans of Bara Genre works) reached mainstream levels of infamy during its time due to the films' focus on the intense and homoerotic bonds between the titular character and the men in his life, several of whom play the role of The Not-Love Interest to the point that his actual love interests seem to fall to the wayside. The films' homoeroticism played an important role in kickstarting ongoing debates regarding the MCU's (as well as Hollywood's) lack of canonical LGBT representation that continue to this day.
Thor: Ragnarok is famously beloved, and memetically known as a film made for bisexuals because of Valkyrie and Loki being canonically bi themselves (and Grandmaster being implied to be pansexual), Hela and Grandmaster being incredibly flamboyant antagonists, and the entire cast, regardless of gender, being ridiculously attractive. Thor also has a reputation as a lesbian ally for being hypermasculine but kind and respectful to women, while Loki's backstory as a secret Frost Giant raised to believe he was an Asgardian and who is looked down upon for embracing "feminine" skills like magic and cunning over brute strength makes him popular with trans fans, furthered when Loki (2021) describes him as genderfluid.
Captain Marvel (2019) is beloved among lesbian/bisexual women for similar reasons as the Captain America films and is often seen as their Distaff Counterpart due to the Les Yay-filled relationship between Carol and her best friend Maria Rambeau serving as its emotional heart, coupled with the absence of any male love interests to get in the way.
Wanda Maximoff came in with a LGBT fanbase from the comics stemming from both being a mutant (the X-men themselves well-known as allegory for being LGBT) and being the mother of two of the most prominent LGBT superheroes, Billy/Wiccan and Tommy/Speed. Her insecurities about being feared and hated for reasons beyond her control before learning to embrace those aspects as one of her strengths, one of the most well-known forms of Rainbow Lens, also carried over to the films.
Like You Would Really Do It: A recurring element in any Marvel-based trailer is to drop hints that a major character is going to die, only to reveal that said character survives. i.e. Captain America's torn shield, Iron Man and War Machine's reactors flickering etc.
The TV and streaming shows have been given this treatment. While they have been received with acclaim for the most part, the films' continuous lack of acknowledgement of the shows' existence despite the "it's all connected" message being constantly pushed in the early days of the MCU made them this in the eyes of many. The Netflix series are hit with this the hardest, due to their cancellation and Disney launching its own streaming service with new shows in tow, being overseen directly by Kevin Feige and starring important characters from the films with the promise of being directly tied into them specifically, which saw the Netflix series being sidelined due to their Darker and Edgier tone.
In 2019 it came to public attention that Gwyneth Paltrow is seemingly unable to remember anything about the franchise beyond Robert Downey Jr., resulting in whatever the new thing is getting this treatment. Hit especially hard is Sebastian Stan, who claims to have had to introduce himself to Paltrow three separate times, including her appearing to immediately forget his existence at the Infinity War premiere.
Minority Show Ghetto: Fully averted with Black Panther. One of the reasons it took so long for the film to be greenlit was Ike Perlmutter's insistence that such a film would bomb due to this. As it turns out, Black Panther ended up becoming the record holder for most financially successful superhero film of all time upon its release, outgrossing even the original Avengers, and was nominated for multiple Oscars, including Best Picture, something previously unheard of for a comic book movie.
A lot of people were mad at Marvel Studios for not announcing a Hulk movie for either Phase 2 or Phase 3. However, the character's film rights are tangled up with Universal; while Marvel Studios owns the character and can freely use him, Universal still owns the distribution rights for any solo film that the character appears in. Therefore, Marvel Studios and Universal are at an impasse with the Hulk unless a cross-studio deal is reached in time for Phase 4.
Thanks to his status as the "face" of Marvel Studios, Feige is frequently the biggest target for criticisms of the MCU such of the lack of diversity, but the Sony email leaks, as well as subsequent articles from sites like Bleeding Cool, revealed Perlmutter to be responsible for much of the foot-dragging in this arena.note For instance, Feige caught a lot of flack for pushing Captain Marvel back to make room for the Spider-Man and Ant-Man movies. It turned out that Feige was the one pushing for a Captain Marvel movie in the first place, refusing to put the Perlmutter-backed Inhumans on the film slate unless he got the Captain Marvel movie as well.. Fans also held Feige responsible for the Executive Meddling that led to Edgar Wright leaving Ant-Man and Joss Whedon being unsatisfied with Avengers: Age of Ultron. Again, it turned out Perlmutter was responsible.
Channing Dungey got a lot of hatred for, among other things nixing the Most Wanted series in its crib upon being promoted to the head of ABC. Kevin Feige later clarified that it was a mutual decision between ABC and Marvel after the series pilot ended up severely underwhelming them all. Fans also act like Dungey is a monster for canceling Agent Carter and moving Agents of SHIELD to a later time slot, but the fact is that SHIELD wasn't getting good ratings in its current time slot (and had been losing viewers for quite some time), while Agent Carter wasnt doing any better. The simple fact that SHIELD was able to keep going for several more seasons, even in a truncated form, is a sign of how hard she fought for it.
There are a number of fans who complain about favoritism towards the movie characters as opposed to the TV ones, particularly where merchandising is concerned. While it is true that the movie heroes get way more merchandise than the TV ones, Marvel generally does not make its own toys. The vast majority of the MCU products are made by other companies that have licensed the properties from Marvel, usually meaning they are the ones deciding who gets a toy and who doesn't. Additionally, a major reason why the movies have so many toys is because a significant portion of their audience consists of children, while the TV shows (especially the Netflix ones) are generally aimed at older, more adult viewers. Compounding the issue even further is that toy companies have a noted tendency to prefer characters with distinctive, eye-catching costumes, while, with the exception of Daredevil, the TV shows usually tend to eschew traditional superhero costumes.
Many have criticized the MCU for having weak villains, and for relying overly on Let's You and Him Fight. What's not taken into account is that the rights of Spider-Man, Fantastic Four, X-Men were distributed to different studios in The '90s, which includes not only the main characters but also the villains and supporting-characters, and greater Worldbuilding. As a result of them being Exiled from Continuity for most of Phase One and Phase Two, many of Marvel's best villains and greatest threats (the likes of Norman Osborn, Magneto, Doctor Doom) were not available to its film-makers and writers. James Gunn, the director of Guardians of the Galaxy pointed out that he wanted Annihilus but he can't access it because of the rights issues, while Ego the Living Planet, a Rogues Gallery Transplant for the sequel was only allowed after a deal with Fox Studios. So while the writers and directors can be criticized for their stories, the fact is they don't have a full deck, unlike DC/WB which does have the rights to all its characters. Of course, how much this changes after the buyout of 20th Century Fox (and thus all X-Men/Fantastic Four-related properties) remains to be seen.
Much of how the cosmic side of the MCU worked, looked and felt can be attributed to James Gunn and his work on the Guardians of the Galaxyfilms after previous sneak peeks in the first two Thor films. In some cases, it's suggested that his films' Bathos-mixed irreverent humor (often scored by period-specific pop music) changed the entirety of the franchise thanks to following directors wanting to emulate him, making Gunn the Real Daddy of the MCU itself. This is evidenced by the aforementioned Taika Waititi admitting that Guardians was a major influence on Ragnarok. Furthermore, nobody in Hollywood wanted to take over the director's chair for Guardians 3 after Gunn's initial firing as it was sacrilegious for anyone to take over the series that Gunn helped define, which subsequently lead to his rehiring.
Never Live It Down: Hawkeye will forever be known by fans as the most useless superhero ever since The Avengers, which was his first major exposure to mainstream audiences. In that movie, he spends most of his screentime as the brainwashed lackey of Loki and his archery skills aren't seen as practical or impressive as those of his fellow Avengers. Not helping matters is that he was absent from more grounded installments in like Captain America: The Winter Soldier and Agents of S.H.I.E.L.D. that could've shown off his fighting skills without comparisons to other superpowered heroes. His poor reputation is even referenced in the movies themselves with Black Widow joking about how he actually keeps the team together because the other Avengers all have to work hard to pretend he's useful, and Ant-Man calling him "Arrow Guy" because he didn't even bother to know his name.
Not-So-Cheap Imitation: X-Men (made by 20th Century Fox) and Spider-Man (made by Sony Pictures) sparked the Comic Book Movie Boom of the 2000s. However, after Marvel made their ownfilm studio, Fox and Sony refused to sell the film rights to the X-Men and Spider-Man back to them for the longest time, leading to the Marvel Cinematic Universe being started without them. However, the Marvel Cinematic Universe ended up being a huge success, usurping the box office records set by the X-Men and Spider-Man movies.
This franchise wasn't the first former Viacom property to later fall under Disneys ownership after Indiana Jones and Doug.
One-Scene Wonder: Occurs frequently—especially in the credits scenes—both with small but significant appearances by recognizable characters/actors, and with characters from the franchise making cameos in each others' works:
Bruce Banner returns the favor in Iron Man 3, appearing in the post-credits scene where it's revealed that Tony's narration throughout the movie was actually him telling the story to Bruce.
Clint Barton/Hawkeye in Thor, which was an uncredited appearance by Jeremy Renner.
Captain America in Thor: The Dark World. Technically just Loki shapeshifting as him, but it was still Chris Evans in the brief appearance, which is well-remembered by fans as a very humorous scene.
Also from Dark World, Benicio del Toro as the Collector in the credits scene, and again (in a larger role, but still only a couple of scenes) in Guardians of the Galaxy.
Howard the Duck is another from Guardians of the Galaxy, again in the post-credits scene. Has another in Guardians of the Galaxy Vol 2.
Scarlet Witch and Quicksilver yet again in a credits scene, this time from Captain America: The Winter Soldier.
Arnim Zola from Winter Soldier as well, as a computerized version of himself that's been preserved for decades.
Thanos serves as this several times, in the credits scenes of Avengers and Avengers: Age of Ultron and as a Two-Scene Wonder (which are relatively small scenes) in Guardians of the Galaxy.
Also from Age of Ultron, Ulysses Klaue, as an Early-Bird Cameo before his larger role in Black Panther.
Howard Stark and Peggy Carter in Ant-Man, who only appear once in the opening scene (which took place decades before the events of the movie proper). Also Falcon, whose only appearance (minus The Stinger, which is a scene directly taken from Captain America: Civil War) is in a brief battle with Ant-Man, which the latter wins.
Everett Ross in Civil War, who is guarding Zemo after his capture, and who later has a much larger role in Black Panther. Aunt May is another, appearing only once here before also getting more scenes in Spider-Man: Homecoming.
Pepper Potts near the end of Homecoming, after having not appeared since Iron Man 3 and was stated in Civil War to have broken up with Tony.
Doctor Strange in Thor: Ragnarok, in which he uses his powers to detain Loki while agreeing to help Thor find his father Odin.
Red Skull in Avengers: Infinity War, after not being seen since Captain America: The First Avenger.
Also from Infinity War, Nick Fury and Maria Hill in The Stinger...in which they both disintegrate into ash as victims of Thanos's fingersnap of doom, though not before Fury sends out a distress signal that's picked up by Captain Marvel.
J. Jonah Jameson in The Stinger for Spider-Man: Far From Home, not just for the character but being played by J. K. Simmons, whose performance as Jameson in the original Spider-Man film series had been on just about everyone's short list of the greatest portrayals of a comic book character ever.
Only the Creator Does It Right: Most of its fans feel that every Marvel comic book should be adapted by Marvel Studios, and based on the success of their adaptations, even critics agree that Marvel Studios understands its properties better than those who license it. The actual evidence for this is mixed especially in regards to those successful films made before the MCU:
The X-Men Film Series is a mixed bag, with some poor movies, but others that are considered among the best movies based on Marvel characters, with Logan in particular considered by some the best superhero movie since The Dark Knight while Deadpool (2016) and its sequel were widely seen as movies that no other studio would do and highly admired for its fidelity to the source and style. X-Men fans point out that while they aren't a fan of Fox's devotion to Movie Superheroes Wear Black aesthetic, their movies in the last ten years or so was the one place where fans of those characters found a measure of validation whereas in the comics at the same time, the X-Men were Demoted to Extra for the sake of the Avengers, and then later saw The Inhumans try and replace them (a fact criticized by Chris Claremont, the greatest writer of the franchise) which discredited the idea that Marvel's current regime would automatically do justice to those characters among these fans. Likewise, the Quicksilver who showed up in X-Men: Days of Future Past was widely considered superior to the one in Avengers: Age of Ultron and Whedon was inspired by the divided rights issues to kill off that character since he had become expendable. With the X-Men headed for the MCU following Disney's acquisition of 20th Century Fox, it remains to be seen how this perception will change on all fronts, though they have announced that the MCU Deadpool will remain played by Ryan Reynolds with an R rating, a move that has been unanimously met with approval.
Of course, in the case of Fox's handling of the Fantastic Four there's little doubt among most that other studios haven't done that property justice with Fantastic Four (2015) (as well as that for the Tim Storyadaptations) making many demand for Marvel's First Family to be put back into its parents' hands. Likewise, MCU has indeed generally produced adaptations considered better than previous attempts at the characters (such as Captain America, Hulk or Daredevil).
On another note, most fans consider producer Kevin Feige to be the true overall visionary of the movie franchise and generally only consider the Marvel works under his watch to be worthwhile. This also feeds in the rivalry between the Cinematic and Netflix productions which have so far never crossed over, and which the movie-side largely treats as Expanded Universe. On another note, fans feel that the Russo brothers handled Spider-Man better in terms of combat and agility in Civil War and Infinity War than Jon Watts. The Russos were the ones who introduced Spider-Man into the Cinematic Universe after all.
James Gunn as writer-director of Guardians of the Galaxy Vol. 1 and Vol. 2 is widely seen as being mainly responsible for turning Z-List characters into overnight A-Listers. The Russo Brothers when they brought the Guardians for Infinity War openly consulted him, and even had him choose a song for the film ("Rubberband Man") and write additional dialogue to maintain character consistency. News of his firing did not go well. Disney initially stood firm in their decision, and while it was announced his script for Vol. 3 would still be used, but even that wasn't enough to stop the fans from demanding they rehire him, so they eventually brought him back outright.
Much like Richard Parker in The Amazing Spider-Man Series, Tony Stark gets a lot of flak from many Spider-Man fans for effectively removing Ben Parker's influence and impact on this version of Peter. Even those who don't want another on-screen rehash of Ben's Death by Origin Story wished that the films at least mention him explicitly.
Michelle Jones being set up as Peter Parker's Love Interest annoyed fans who were holding out for Mary Jane Watson's potential appearance in the MCU down the line. The fact that Michelle goes by MJ, which is Mary Jane's nickname, is a subject of contention among fans.
Hawkeye and Coulson only have a single brief exchange in Thor, but they somehow spawned an enormous following with over 9000 fanfics on Archive of Our Own alone.
Shipping Black Widow with Maria Hill is remarkably popular despite the fact that in the three movies they've shared together, the two of them have barely spoken to each other or shared any one-on-one scenes. Natashill or Widowhill is probably the most popular ship for Black Widow among people who don't prefer Natasha with Hawkeye.
Scott Lang/Peter Quill is a surprisingly popular ship in Asia even though the two have never met and don't even live in the same solar system. May have to do with both actors appearing on Parks and Recreation beforehand.
Stephen Strange/Tony Stark quickly became a popular pairing due to their similar story arcs across their respective first films. Both actors have also played Sherlock Holmes, one of the oldest gay ship fandoms. Then they DID finally meet, and the shipping only increased.
Theres Stephen Strange and Everett K. Ross, due to the latter being played by Martin Freeman.
Peter Parker and Shuri (of the platonic and romantic varieties), thanks to both being AdorkableTeen Geniuses, aided by the likelihood that they'd run into each other during Tony's meetings with T'Challa. Or in keeping with the Ho Yay theme, Peter introducing her to Michelle.
Captain Marvel and Valkyrie have never met; yet, they started picking up steam after the former's movie was released, as both are strong female characters read as lesbians by a significant portion of the fandom. It's also generally agreed that Thor would be the local Shipper on Deck. The actresses are also very good friends and fully endorse the pairing.
Peter Parker and Harley Keener are often paired together since both are Tony's prodigies, despite the fact that they don't even appear in the same movie until Avengers: Endgame. It helps that they're both very similar and would get along if they ever interacted. (Both characters are written to be similarand to get along with Tony which coincidentally makes them similar to each other)
So Okay, It's Average: Phase 2 has this sentiment. Mostly because Avengers Age of Ultron which is the big team up movie and successor to the first one was considered lackluster and a letdown, and given its status as a Grand Finale to that period, it tends to determine how people feel about it. Likewise Thor: The Dark World is considered the weakest Marvel entry. Iron Man 3 is at the least considered better than Iron Man 2 and opinions about it have been more favorable in recent times, Ant-Man is either really good or So Okay, It's Average at worst, while The Winter Soldier and Guardians of the Galaxy are the stand-out films for this era.
Tastes Like Diabetes: Some viewers find the MCU so light and humorous that it reduces the sense of stakes or drama, coupled with Contractual Immortality that ensures most of the big characters that are in supposed "danger" will live.
A common criticism of the Thor films was that Asgard, and the rest of the Nine Realms for that matter, were never really explored to its full potential. The concept of a pantheon of extradimensional/divine beings had a lot of potential of exploring the fantasy elements of the MCU such as the existence of other pantheons much like in the comics. Instead, the first two films put more focus on the human cast. Even in Ragnarok which averts this problem, Asgard itself remained Out of Focus in favour of the subplot in Sakaar, with the destruction of Asgard and the death of most of its major characters putting an axe on any hopes of further exploring Asgard and the rest of the Nine Realms.
The chasm between the films and the first several TV series, as they were managed by different studios. The series only contact with the films was through spoken references and cameos of minor film characters, and the films only recognitions of the TV series were a brief cameo of Edwin Jarvis and some extremely subtle nods in dialogue and text. That means that no actual team-ups ever took place, and that several interesting stories from the TV series never made their way into the films, and the consequences of Thanos' snap in Infinity War were not explored by any of them.
In 2017 Marvel finally got the rights to the X-Men back and quickly announced they would be integrating them into the franchise. Unfortunately, Hugh Jackman was also quick to make clear he wouldn't be coming along with it, and with his portrayal of Wolverine being universally regarded as one of the greatest performances of a comic book character ever even if some filmsaround him were of questionable quality, you have to pity the actor picked to replace him.
Unlike the movies, the Netflix series are not family-friendly in the slightest. They are both extremely violent and deal with very heavy themes such as moral boundaries, alcoholism, PTSD, rape, and racism. A Lego Avengers game based on the MCU actually left Daredevil and Jessica Jones out due to their adult content, while Disney Infinity wasn't allowed to use Daredevil or Jessica because the higher-ups didn't think either of their shows were appropriate for the game's family audience. It's to the point where the Netflix series will not be put on Disney's upcoming streaming service for being too dark compared to everything else.
The same could be said for the Hulu series Runaways (2017). It's not quite as dark as the Netflix series (being a "mere" TV-14 LSV to their TV-MA) but it's much edgier to both the movies and the comics it was based on. It's filled with vulgar language, sexual content, references, and innuendos (including gratuitous fanservice from both the teens and the adults), rather disturbing imagery, depictions of abuse, attempted rape, and murder played for maximum shock value. Oh, and woe betide anyone who thinks the teenage protagonists will act like the squeaky clean teenagers they might be accustomed to in other media, as they act about what you'd expect from teenagers in real life.
After the disappointing performance of The Amazing Spider-Man 2, Marvel had to work in order to renew faith in the film franchise with the solo Spider-Man movie, along with whatever movie the character appears in beforehand. Judging by fan reactions to his role in Civil War, they're off to an amazing start.
With the sole exception of his suit in the first film, Captain America's various costumes have drawn criticism from some areas of the internet, either for being too camp and colorful, or for the cowl looking odd (The Avengers), abandoning the traditional stars and stripes (Captain America: The Winter Soldier), or for just looking ugly (Age of Ultron). Obviously, many disagree (in particular, pointing out that Cap's SHIELD-ized uniform in TWS was a subtle indicator that something was seriously wrong at the start of the film), but it's a popular sentiment.
Hawkeye's suit in The Avengers drew criticism for looking more like his Ultimate Marvel incarnation's uniform (which is largely considered 'pragmatic but boring'). The creators listened and in the second film he's gotten an awesome new outfit that's a mishmash of his various costumes from the comics, complete with Badass Longcoat. Then, for Captain America: Civil War, his look has been revamped to what can best be described as his classic outfit with MCU aesthetics, with the only detail missing being his mask.
Deathlok and Mockingbird also got criticism for their suits in Agents of S.H.I.E.L.D.. The problem with Deathlok was mainly that his cybernetics are internalized rather than on the outside like his mainstream counterpart, with the result that his armor looks cheap rather than intimidating. Mockingbird got complaints just for not initially looking like her comic self, though this was corrected by her second appearance (her hair is shown to be blonde like in the comics and her outfit is a more muted version of her normal costume with the same kind of extra armor and padding that Black Widow and Captain America had for their costumes).
Daredevil's costume got some wary comments though in his case it's justified; the black ninja-esque outfit is the one he starts out with before upgrading to his actual costume. Though now there are fans who complain about his red suit and wish he'd go back to his homemade black one, in large part because they feel it looks too much like Captain America and other MCU heroes.
The design of the later Iron Man suits are not as well liked as the earlier suits being unfavorably compared to Tony's most iconic suits the Mark 3 and Mark 7. Most of the later Iron Man suits lack the bulky, mechanical feel of the early suits and can feel overly CGI and fake. The most disliked looks are the Mark 46 and Mark 50. This is due to the Mark 46 being a Powerup Let Down meaning the Glass Cannon/Fragile Speedster design to the Iron Man Armor isn't just cosmetic but a in-universe weaker suit and the Mark 50 simply looking too flowing and organic, which might be justified by the suit being nanotech but that doesn't mean the fans have to like it. The Mark 85 does fix the criticisms of the Mark 50 by being more layered and mechanical with a much more satisfying suit up.