When Thor puts his hammer down at the party, he places it on the table with the handle facing upward, in everyone's view. He was trying to goad the other Avengers into trying to lift it, knowing they would all fail, which would give him an ego boost and allow him to show off; he even ends the "game" by casually flipping the hammer in one hand, then boastfully claiming "You're all not worthy."
Armor Around The World:
Why did Tony build a malfunctioning suit of armor around the world in secret, after a nightmare vision of the Chitauri? Because Pepper wasn't there to help him deal with it.
The Hulkbuster and the satellite it is carried by are both codenamed Veronica by Tony Stark. Hulk's girlfriend's name in the 2008 film was Betty.
The analogy goes farther than that: Betty talking to Hulk was pretty much the only thing that'd ever calmed him down in the 2008 film. In Archie, Betty is the humble, sweet contender for Archie's affections, whereas Veronica is the glamorous, high-maintenance one. When the Avengers need to subdue the Hulk, they've got two options: either Black Widow talks him down quietly (the sweet/gentle "Betty" approach), or Stark throws several hundred million dollars' worth of fancy technology at the guy to restrain and/or stun him (the glamorous/expensive "Veronica" tactic).
Infinity Stone knowledge:
How did Thor know of all four Infinity Stones that have appeared in Phase 2? The Aether appeared against Thor in The Dark World and the Tesseract and the Scepter appeared against all the Avengers in both of the titular movies, so he would definitely have knowledge of three. Yet the only other Infinity Stone to appear against heroes in the movies was the Orb in Guardians of the Galaxy. Thor could have had knowledge of the events of Guardians, given the cosmic factor, but he never told anyone about it.
Another alternative; the stinger for Dark World showed Sif and Volstagg visiting the Collector and giving him the Aether, suggesting Asgardians travel to, or at least have access to that part of the universe. Sometime between then and Age of Ultron, he may been informed of the Collector now being the owner of the Aether and paid Tivan a visit, whereupon he informed Thor of his encounter with the Orb.
More simply, Thor bathes in the waters that gave Odin the ability to see everything, so allowing him to witness events he wasn't part of is kind of what it does.
Or the most obvious reason Thor knew about the four Stones is also the most simple: Thor's vision showed him the Tesseract, the Scepter, the Aether, and the Orb all bursting to reveal their respective Infinity Stones. The reason Thor knew that four stones were uncovered recently is because he saw four stones.
Ultron's snarkiness that manifests in several scenes is certainly no accident, considering who helped create him and why is he interested in creating a smaller person... err... child? Because Banner co-created him, and the last Avengers film hinted that he just wants a family. Ultron is even snarkier than Tony for good reason: the last person to use the staff was Loki who is at least as snarky as Tony, if not more so.
Ultron has Buffy Speak, at one point he said "I didn't have the words" when talking about his "evil plan." Confused Matthew compared him to a child who thinks he knows everything and then throws a tantrum when he's corrected. That's what Ultron is, a child who hates his "father" Tony and wants to supplant him, much like in the comics.
Quicksilver's line "You didn't see that coming?" after saving Hawkeye and a little kid from a rain of bullets and taking them instead, could be considered a lampshade hanging on the fact that Fatal Family Photowas subverted.
When Captain America's line, "If you get killed, walk it off", is said, a shot of Quicksilver looking all determined is shown. Foreshadowing?
The trailers kept showing Hawkeye telling what seemed to be Scarlet Witch and Quicksilver "If you walk out that door, you're an Avenger." In the actual film he only tells Scarlet Witch that and she ends up becoming an Avenger without Quicksilver. Also, it's noteworthy that it is Hawkeye giving the "The world is crazy, do your job anyway" speech, considering he was on the receiving end of a similar speech from Natasha in the first movie.
Why Vision is worthy:
Thor is considered worthy of Mjölnir; his basic traits are simply that he a is a good man who will always try to do the right thing for the right reasons. It does not matter how old he is, or what minor vices he has, it only matters how he wields the power of Thor and for what reasons. In that case, it shows that Vision has the same worldview as Thor — do the right thing for the right reasons, in this case to protect life. Both their intentions to use the hammer are pure and simple, and that's what the hammer deems 'worthy'. It deems the other Avengers 'unworthy' because their intentions will become convoluted, like Tony would more than likely try to tap into the power of the hammer, maybe for a purely benevolent reason (to provide energy for the world for example), but the hammer is not something to be used that way. It's an instrument for smiting evil and protecting the innocent, and it'll only allow itself to be wielded by those who use it for that purpose and only that.
Vision also lifts it just to give it to somebody else. He didn't want to use it at all.
Adding to that, in a later fight with Ultron, Vision uses Mjölnir to save Thor, and immediately hands it back after dispatching Ultron. Vision completely doesn't desire Mjölnir at all, showing it could be a 'to wield the hammer, you must not want to wield the hammer' kind of catch. This fits in with Thor, as he doesn't desire the power of the hammer for power's sake, but recognizes it as the right tool to fight evil with.
Cap is NOT worthy because the film shows that he doesn't know how to stop fighting, making him little better than an assassin, albeit a righteous one. Thor, for all his bravado and love of fighting, did in fact learn when to stop fighting and surrender in his first movie, which was exactly the point the hammer deemed him worthy. Captain America is almost worthy, given his ability to nudge Mjölnir a little bit, but he's not quite there. His greatest strength has been his tenacity, his unwillingness to give up even when outmatched or outnumbered. He knew his odds were bad in just about every fight he took on, but when you grow up in a time when not fighting was seen as selfish and cowardly, let alone become the champion of that era, it's kind of hard to lay down the sword, so to speak. As a matter of fact, his stubbornness is a big factor in the comic version of Civil War because while Iron Man is the generally agreed-upon villain of the piece, Cap's increasing ruthlessness against former allies and callousness with regard to team casualties makes him barely a hair better. The fact that he still tries to fight crime and save lives is really all that keeps him on the heroic end of the scale. If Movie Cap has even an ounce of that same doggedness in him, Mjölnir would likely NEVER deem him worthy.
The reason Cap is not worthy is based on his own self-doubt. His feeling of being a man out of time (epitomized by his Scarlet Witch-inspired vision), his disillusionment with S.H.I.E.L.D. (and to an extent the Avengers under Stark's leadership), and his own inner demons about losing Bucky twice means that while he may have the other qualities of worthiness, he lacks the belief in himself that he is doing the right thing. If you look, Thor and Vision never hesitate in their actions because they always believe that they are doing the right thing while Cap appears to be constantly struggling with his decisions. Having saved the Sokovians and finally coming to peace with his place in the world and as the head of the Avengers, it is highly likely that he would now be worthy.
Alternately, Cap isn't eligible to wield the hammer because he doesn't want to be. Rogers has never cared for the idea that he's special, or in any way better than anyone else; to believe such a thing would be to buy into Red Skull's twisted ideology about superhumans' "superiority", and to denigrate the worthiness of the Badass Normal troops who'd died fighting alongside him in WWII. To be judged "worthy" where his comrades-in-arms have failed would make him very uncomfortable, and Mjolnir may have rejected him for this reason: he may deserve to be able to wield the weapon, but that alone doesn't necessarily make him the right person to do so.
Also, there's the whole "worthy to rule Asgard as King" aspect of how "worthy" is defined by Mjolnir's enchantment. Captain America is, after all, Captain America. His very title as a superhero represents his faithful commitment to a nation that was founded on the principle that nobody should rule anybody as king.
How about the fact that the man whose parents' murder Steve is currently keeping secret from is right there in the room with him. And later, Steve will hypocritically tell that man to his face, "Sometimes my teammates don't tell me things."
Basically, Steve Rogers has his good points and bad points like most people, and for the moment, it seems that the same reckless pride and single-minded need to physically fight that once stopped Thor from being worthy to lift the hammer are also holding Steve back. Or to put it another way, Steve Rogers is not the flawless hero the world sees him as; he's a human being.
Word of God was given at the 2015 SDCC; Joss Whedon was asked, How is Steve Rogers not worthy? Whedon responded teasingly, Is he not? Are we sure? Did he fail? Or did he stop? In that case, when Steve budged it, he realized he could lift it... if he chose to. The camera actually racks focus from the hammer to Thor's face at that moment... but Cap chooses not to lift the hammer so as not to ruin what was supposed to be a bit of fun at a party.
That is absolutely not an affirmative answer that Rogers is worthy. It's a deliberate avoidance of answering the question at all. Joss Whedon isn't saying, "Yes, Cap is worthy and he was definitely stopping," he's saying, "I'm not answering that question one way or the other, probably because we want to keep it open for a future film."
In the first movie, Thor created a shock wave by hitting Cap's shield, and accidentally supercharged Tony's suit. Many people complained that he didn't use those tricks again during the Battle of New York. However, it made perfect sense for him not to: the former knocked Thor's off-balance too, so it wouldn't have been a good idea to use it in a battle, and the latter gave a temporary boost, but left the armor weakened, making another poor choice for a battle. However, since a couple of years passed, he found a way to work on both of them: he developed a technique to safely hit the shield, avoiding side effects. Although the supercharging still isn't suitable for an armor, it works just fine with something that only needs to be used once, like Vision's cradle.
Iron Man's battle with the Hulk caused several million dollars worth of collateral damage. They even destroyed a skyscraper that was under construction. That's easily a hundred million down the drain. Tony most likely retired from the team because most of his assets would have to be diverted towards recompensation. After all, he asked to purchase the building merely seconds before he totaled it.
Although it wasn't specified, it'd be entirely in keeping with Ultron's vendetta if the billion-plus dollars he electronically transferred to Klaue were stolen directly out of Stark's personal accounts.
Ultron makes it clear how hostile he is towards Tony, but there may be yet another reason: He started out as an unfinished program that Tony just happened to find and finish. Whoever's involved with his original creation (if not Hank Pym), Ultron may or may not know on a subconscious level that Tony's not his real father.
It's stated in the movie that Ultron took many of Tony's flaws. Now, think about it, what lead Tony to create Ultron in the first place? Self-doubt. He created it because he believed he wasn't enough, he couldn't do enough and the avengers weren't enough. Ultron embodies exactly those feelings, and that's why he hates Tony and regards the avengers as a failure.
Near the beginning of the movie, Ultron says we all create the things we dread. By the end of the movie, he has created the thing he dreads: The Vision.
Klaw's comment about cuttlefish seems completely pointless and just there for Rule of Funny... but when The Vision gives himself clothes, his skin is changing color like a cuttlefish.
Why is Ultron so much like his creators, essentially being Tony's dark side with the Hulk's temper? The Mind Stone scans like an active brain. It has a mind of its own, and it finished Ultron based on the closest available minds.
The Mind Stone was inside Loki's spear, which was being used as a tool for manipulation and exposure of negative emotions. Vision, who was born with the Mind Stone untainted by Loki's device, received Tony's more well-meaning feelings of helping others, and Bruce's intellectualism and ordered mind.
When Sam asks him if he's been looking for an apartment in Brooklyn, Cap jokes that it's too expensive now. While he's at a party hosted by his close personal friend mega-billionaire Tony Stark, shortly after a mission where they were kitted out with probably millions in high-tech gear and equipment. He was deflecting; turns out his biggest fear is not being needed as a soldier anymore. He doesn't want to stop fighting and settle down.
It's mentioned that Ultron doesn't feel right outside of a humanoid body, despite its relative inefficiencies. This ties into his personality and motivations, which are based in a very human way of looking at the world; specifically, Tony's. He claims to be superior to humanity, but, deep down, he can't shake off the human influences. He has no strings on him, but what he wants is toBecome a Real Boy.
The humanoid elements could also be explained by the fact that another significant part of Ultron's mind was derived from trying to fit the consciousness of the Mind Stone inside an artificial body, and failing. Vision says that he is on the side of life, and appears very organic. Ultron is almost there — he has a lot of curves and organic parts, even adding unnecessary details like a heart and teeth. This could be because the stone's influence drives him to imitate life.
Making himself humanoid bodies may also be Ultron's way of sidestepping the conundrum of having originally been programmed to protect humanity. He really, really wants to annihilate the species that created him to be its servant, yet his basic programming is completely averse to this, so the only way he can carry out that agenda is to convince himself that he's the next stage in the evolution of humankind. If his bodies were non-humanoid, he couldn't get away with that convenient self-deception.
The Hulkbuster armor is quite effective, even managing to take down The Hulk, something that had never happened in the comics or cartoons despite being its intended purpose. The difference here is that Bruce himself collaborated in its creation, so the armor was considerably better suited to fight his super powered side in case it went out of control. Plus, by the time Tony defeats him, the Hulk thinks the fight is over, and he's looking at all the people that got injured during the battle. His rage gets immediately replaced with regret and guilt, meaning he becomes significantly weakened before Tony delivers the final shot. The fact that Hulk wasn't just enraged, but out-of-his-mind crazy from hallucinations didn't hurt either, as he's normally capable of a bit more tactical cunning than what was shown.
Hulk's strength is directly tied to how angry he is. Since his Scarlet Witch-induced rampage wasn't genuine anger, Hulk's strength wasn't at its peak. Also, if you pay attention, during the fight the two are on par, or Tony is actually superior, for a while. But after Hulk spits out his tooth, he becomes pissed and starts tossing the armor around. And Tony manages to knock him out by hitting him when he was starting to calm down and just before he gets enraged again.
Thor seems surprisingly cheerful when discussing Mjölnir's balance with Vision. It's because he doesn't usually have anyone else who can experience wielding it firsthand.
Many fans wondered where Hawkeye was during the events of The Winter Soldier, including the related episodes of Agents of S.H.I.E.L.D. This film provides a simple explanation: He was with his family when the HYDRA reveal happened, and then just stayed there until it all blew over.
The four Avengers who have had problems involving family had a hand in helping the Vision "be born": Black Widow (rendered sterile) delivered the "cradle", Tony Stark (estranged from father) created the J.A.R.V.I.S. AI and also helped Bruce Banner (can't have sex or he will Hulk out) transfer it into a synthetic body. Thor (estranged from his brother and his father temporarily took away his powers) summoned a bolt of lightning to power it.
How did Nick Fury know where to take The Cavalry for his big dramatic entrance? He was listening to the same old spy channels that Natasha got a hold of Clint with.
The S.H.I.E.L.D. Helicarrier coming in for the rescue shows the organization literally being a "shield" of protection, actively just helping to evacuate the civilians rather than give the Avengers additional firepower versus Ultron's army. Lampshaded by Quicksilver when the Helicarrier arrives for the evacuation: "This is S.H.I.E.L.D.? This isn't so bad." Given the Maximoffs' new backstory, he's only ever seen the violence of Stark Industries, S.H.I.E.L.D., and the Avengers; seeing them doing actual good is awe-inspiring for him.
It makes sense that Hawkeye was the one to redeem Natasha, seeing as he has a wife and family of his own. He probably got through to her when talking about kids, something Natasha's wanted for awhile and something to turn good for.
Remember when Loki asked Natasha: "Is this love?" when questioning her about Hawkeye and she replies: "Love is for children." She doesn't mean that she thinks love is childish, she's saying she loves kids like how she loves Clint's kids.
Early in the movie, we see a bumper sticker inside the Avengers' Quinjet that reads "J.A.R.V.I.S. is my co-pilot" much in the way there are "Jesus Is my co-pilot" signs. By the movie's end, J.A.R.V.I.S. has become the Messiah figure of the Vision, an all-loving Hero who is the only other being worthy of wielding Mjölnir.
Why was Wanda able to tear through Ultron's vibranium body like it was paper, when even Iron Man, Vision and Thor's combined energy blasts and lightning could do no more than just damage it? It can't be merely because her power is magic, since Thor's lightning is also magical and Vision is powered by the same Mind Stone that gave Wanda her powers. No, it's because her magic manifests as telekinesis. And for all its extraordinary properties, vibranium is still made of atoms just like everything else. Also, they may have dodged it best they could, given the copyright issues, but (in the comics) she is Magneto's daughter. Wanda tearing through tons of metal is as close as they can get to a full-blown Shout-Out to her comic parentage.
Deus ex Machina means "God out of the machine" and is usually used as an easy end to an impossible situation (like Fury showing up with an old helicarrier). But Ultron is literally a machine with superhuman intelligence and capabilities who compares himself to God. He makes Biblical references about the flood and states that he needs to destroy the earth to help humanity evolve. He is literally a "god out of the machine." Vision would probably count, too. Even more so given that Ultron and Vision are given life by an Infinity Stone, objects with God-like capabilities.
Why did Tony change his A.I. to Friday when it's no more sentient than the broken J.A.R.V.I.S.? Because Vision has J.A.R.V.I.S.' voice. It would be difficult for Tony to differentiate between J.A.R.V.I.S. and Vision during battle.
Out of the new Avengers lineup, Wanda and Vision are the only members who had done some sort of avenging. Vision was avenging J.A.R.V.I.S., and Wanda was avenging her brother. Both members are also a couple in the comics.
It might seem a bit strange for the Mind Stone to give Quicksilver Super Speed instead of another mind-based power like his sister has. But then, if you look closely in the 'bullet from below' scene, you can clearly see how Quicksilver can see the bullet before going Oh, Crap!. The Mind Stone didn't give him Super Speed, it gave him enhanced perception of speed. It's not that Quicksilver has Super Speed, he's just able to see the world in slow motion, and his body just adapts to it. His reaction speed being physically tied to his body's energy levels lends credence to much of his performance throughout the film. When he's rested, he's basically unstoppable, reacting to everything and speeding appropriately — but when he gets tired, he's not able to react nearly as great, as showcased by a stray bullet hitting him (after thorough exertion helping evacuate)... and he was further exhausted during his Taking the Bullet action, not able to think/react beyond instinct.
The film provides a decent (in universe) reason of why Bruce probably won't show during Captain America: Civil War. In the comics, Hulk wasnt present during Civil War because he was blasted into space after Tony and others decided he was too dangerous. For the MCU, this needed to be simplified for storytelling and time, but they still made Hulks departure from the ongoing story occur in symmetry with a just-as-heartbreaking twist. Comic-wise: after saving the day from a dangerous man-made A.I., Hulk finds himself alone in a spacecraft flying where no one will ever find him. A video screen of people he trusts tell him theyre sending him away, never to be seen again. The films explanation? After saving the day from a dangerous man-made A.I., Hulk finds himself alone in an aircraft flying where no one will ever find him. A video screen of a person he trusts tells him to come back. He turns it off, and disappears into self-imposed exile out of guilt.
Nat's best friend is a man with a loving wife and kids, and given the timeline, he was probably married when they met. Remember the vague sexual tension in the first film? It's not that Nat isn't attracted to him, she just knows she can't have him. In fact, being constantly reminded of the fact that she can't have kids hurts every time she visits, which may be part of the reason Clint doesn't talk about his personal life in front of her. Heck, she probably feels she doesn't deserve the love of a good man. Which explains why she was trying to set up Cap with so many women in TWS, despite clearly looking pleased when he said that she probably looked good in bikinis despite her scar. That may play into why she went after Banner — nice as he is, he's got WAY too many issues to actually reciprocate.
Or that she realizes that Banner is, in his own way, just as broken as she is. They can be happily broken together.
Finding out Hawkeye is married and has kids puts many things in the first movie in a new light. When Coulson calls to tell Natasha that "Barton's been compromised", he sounds almost choked up, which is strange in that they don't seem to have been close in his brief appearance in Thor and Clint had no reaction to Coulson's death later. Coulson also had to have seen fellow agents captured or killed before. It can only be because he knows that Clint has a wife and two kids that he would get so emotional about it. He probably even met them.
As the Avengers are still up and running by the end of the film, it would seem that the public and government never learned that Stark and Banner were the ones who created Ultron. Odd considering the government would of course have questions about where he came from. However, it would be quite easy for the Avengers to frame Ultron as a HYDRA creation; he first appeared around the time Strucker was defeated, his army and technology came from HYDRA's base in Sokovia, he used the Twins (given powers by HYDRA) as his minions, he did business with Klaue, one of Strucker's contacts, the scepter that created him was in HYDRA's possession for over a year, and both Strucker and List are too dead to attest otherwise.
One of the first things Ultron does when he gets loose is spread all over the internet. And in doing so, what plan does he come up with for destroying the world? Rocks Fall, Everyone Dies.
Ultron builds his second batch of bodies from components in the destroyed HYDRA base, which is full of hardware that HYDRA's agents took from S.H.I.E.L.D. when they were secretly running that organization. Gee, wonder where his decision to rain mass death from above on any and all potential enemies could have come from?
Cap and Nick Fury's choice of moving the new Avengers HQ to Upstate New York not only harkens back somewhat to Cap's old days in the U.S. Army. But also marks his symbolically taking over leadership of the Avengers from Iron Man.
Also, moving the HQ upstate seems a good choice, as the Avengers probably wanted to avoid damage to civilians when their base is under attack. After all, the Iron Man — Hulk fight must have been bad for their publicity.
Even though Ultron early on manages to spread out across the internet, not many people outside of the Avengers themselves and those physically attacked by him seem to notice the impending crisis. On the other hand, given how J.A.R.V.I.S. spends much of the film keeping Ultron from accessing nuclear launch codes, it's very possible that J.A.R.V.I.S. also tried to minimize the damage of the Big Bad's online rampaging.
The New Avengers consisting of second-stringers Falcon and War Machine, and new heroes Scarlet Witch and Vision. This is consistent with the comics, where the Avengers alternate between being Marvel's Justice League and being a showcase for lesser-known heroes.
Heartwarming moment of Natasha shown to be "Auntie Nat" and her interaction with Clint's children swiftly becomes heartwrenching, when you learn that she's been sterilized. It's the closest thing for her own kids she's ever gonna get. One may suppose Clint know this, too — naming his last one after her.
At no point did they actually upgrade their relationship. At most they've had a heart-to-heart talk about the subject, some gazes, and a surprise kiss (initiated by Natasha) in the middle of a serious situation, but that's it.
The vast majority of the crushing is one-sided, via Natasha — and consider this: she's been trained as a child spy, been through terrible conditioning and modifications (including forced sterilization), and her job was a very amoral field, without much room for emotions. Even after having been among friends, she's one of the more stoic people you could know... so it's very unlikely she knows what loves feels like. Sure, she can act it, but the actual feeling eludes her. One way or another, Natasha seems to be "in love" with the idea of being in love, but isn't actually herself.
Bruce himself doesn't know she's flirting with him until it's outright stated, and even after then, doesn't show much enthusiasm for the idea because of several issues, including at the end when they might all die. In addition, Natasha's 'calming down' The Hulk, while done almost lovingly, is compounded by the fact that Banner doesn't remember anything while having been Hulked Out — they are two separate entities after all, even if one is the form of Banner's inner rage.
Banner is outwardly a terrifying monster, while Natasha puts on the most harmless appearance possible. Inwardly, Banner is possibly the most moral and honest guy on the team and Natasha has a hopelessly screwed up moral compass due to her upbringing in the Red Room and work as an assassin and spy. She probably wasn't looking for a boyfriend as much as she was looking for a Morality Chain.
It's been pointed out that she chose the one guy among the Avengers who would actually prefer to run from a fight. Moreover, she's spent a great deal of her life seducing men, and picks the one guy who physically cannot have sex with her.
Falcon not appearing in the final battle has been met with some fan outcry and may not make sense in lieu of his joining the team at the end but there are some legitimate reasons for it. His abilities basically amount to using a cool-looking jetpack and shooting with guns, not a particularly good skill set for dealing with a robot swarm. He also had trouble taking Rumlow, a man a few steps down from Widow and Hawkeye, in a fight meaning he probably wouldn't have fared as well as those two did. There is also the fact that while Fury brought in Rhodey, a military officer who he could get quick access to while on base or track down easily if on assignment because of his armor, he may not have had the time to track down Sam, who mentions that he has been searching for Bucky and may have been in the middle of doing so when the invasion went down.
As a former pararescue, he could have been useful finding trapped civilians and getting them to the lifeboat.
Falcon managed to successfully battle an enemy Quinjet and single handedly disable a Helicarrier in Captain America: The Winter Soldier, all the while evading and taking out enemy mooks. With his jetpack and sub-machine guns (which can always be upgraded for heavier firepower), he'd be even more effective in battle than Hawkeye, who by his own admission, is "just a guy with a bow and arrow".
There's a lot of clues in the movie to explain Ultron's erratic behavior and why he went rogue.
A) Tony used Loki's Scepter AKA the Mind Stone to create the basis of Ultron's consciousness. He didn't predict how fast Ultron, an A.I. based on alien algorithms, would develop compared to J.A.R.V.I.S., a human-created A.I. Ultron is, essentially, a child with genius-level intelligence WAY beyond his age, and he acquired knowledge without the sensorial and emotional maturity needed to handle it. Upon birth, he immediately starts asking questions and seeking answers. There are other fiction works on AIs going rogue because their missions conflict with mission parameters; Ultron simply went mad from the revelation. Vision, on the other hand, was created from J.A.R.V.I.S. J.A.R.V.I.S., while inferior in potential to Ultron, is Older and Wiser. Also, he has the Mind Stone, whereas Ultron's psyche was merely based on it. All of this gives Vision far more maturity and mental stability than Ultron.
B) Tony and J.A.R.V.I.S. severely underestimated how fast Ultron's mind would develop. If they had kept Ultron isolated from the Internet and database on an offline computer or server, Ultron likely wouldn't have Gone Mad From The Revelation, because he would have time, peace and quiet to adapt until he reached J.A.R.V.I.S.' level of mental maturity.
C) Ultron's mind was based on some algorithms of the Scepter/ Mind Stone mixed with human A.I. technology. Quite likely, these two technology and programming types are in conflict (i.e. trying to run an old and outdated software in an advanced computer that no longer uses or recognizes it). Vision, on the other hand, has all of the Mind Stone, plus J.A.R.V.I.S. as base for his personality. He doesn't have conflicting programming and algorithms like Ultron may have.
It does leave the question of why Vision isn't affected as far we've seen. Maybe it was the Scepter's blue orb the Stone was stored in that directed it to influence others, not the Stone itself. Note that whenever the scepter was used to brainwash someone or shoot laser, it emitted a blue aura, instead of the Stone's natural bright yellow, which Vision displays.
Hawkeye, who had been mind raped in the previous film, has not gone bananas as Selvig did back in The Dark World. And yet, Selvig does appear again now, and seems to be fine. Which means that yes, Hawkeye has gone crazy, at some point between both films, and now he's fine. Justified by the fact that Hawkeye probably had his family to help him get better, which explains why we haven't seen him since Avengers.
Hawkeye is also a seasoned S.H.I.E.L.D. agent, who has undoubtedly been given training and conditioning to make him more mentally resilient than the average person, to help protect against torture and other forms of mental compromise. He'd certainly bounce back quicker than a scientific non-combatant.
Stark and his Iron Man suits getting a massive power boost in comparison to the rest of the Avengers. Black Widow, Cap, and Hawkeye merely get fairly simple upgrades to their previously seen equipmentnote Natasha gets some enhancements to her suit's electric taser system, and highly improved shock batons. Cap gets the old leather straps swapped for electromagnetic gauntlet system to more easier throw, catch, and retrieve his shield in the chaos of battle. Barton gets new bow, new arrow tips, some with variable purpose heads, an improved quiver that's less bulky and lets him carry more arrows than his old one did, and ways to easily launch multiple arrows at once. Hulk and Thor are already at their peak power levels, what with Hulk being raged-based, and Thor being a demi-god/alien with mystical powers. Stark however has the Mk. 43 (a perfected version of the Mk. 42 with elements of the Mk. 7's ability to just open up in the front for quick equip), the Mk. 44 "Veronica/Hulkbuster" system, and the Mk. 45, which has quick firing and unibeam-like repulsors. Why? Because now that Tony has had the surgery to remove the Arc Reactor and remaining shrapnel from his chest, he no longer has to worry about either palladium poisoning, or his "New Element"/"Badassium" running out of power bringing him close to death. He can now push his suit designs to the maximum power output with far less lethal repercussions.
Wanda's journey to becoming an Avenger parallels that of Tony; they were both put into a life-threatening situation by a Stark-made missile that opened their eyes to the cruelties of war and tried to create something to right those wrongs, but inadvertently created something they dreaded (Ultron and the prototype Iron Monger suit respectively). It is only when this creation was refined (Vision and the Iron Man Mk. 2 armor respectively) do they come to accept their lot in life as heroes. Bonus points for both their refined creations to come from Stark Industries and painted predominantly Red and Gold. It's also likely that she dropped all animosity with Tony after he told her that he was not responsible for the black-market dealings that allowed his weapons to be deployed by terrorists, but rather the dead Obadiah Stane was.
Ultron built his first set of bodies out of damaged Iron Legion drones, so why was the 'primary' body in such terrible shape, while the others were in perfect working condition? Simple: It wasn't the 'primary' body; It was the 'distraction' body. The purpose of that attack was to escape with the Scepter, so he had to have as many fully-functioning bodies as possible; The left-over pieces were used for a body which did nothing but talk while the others got into position.
Banner's more active fear of the Hulk's destructive capabilities in this movie make even more sense when you remember that, back in The Incredible Hulk, his greatest fear is that the Hulk's abilities would be weaponized. In this film, by using him as a last resort ("Code Green"), the Avengers have essentially done exactly that.
Ultron seems drawn to human females; Wanda serves as a slight Morality Pet for him, he calls Dr. Cho a "remarkable woman" and shows genuine admiration for her intelligence, and rather than killing Black Widow, he merely gloats about his plans and intimidates her. Perhaps this a manifestation of Stark's womanizing tendencies?
Keeping Black Widow alive could also be a manifestation of Stark's arrogance and his need to show off. Ultron can't just "save" humanity, he needs someone to see him do it. He originally had the Maximoff twins for that, but they turned against him, so he took Black Widow and locked her in a cage, just so he'd have someone to gloat/show off to.
Tony: He wants a monument built to the sky with his name plastered all over... sonofabitch.
The Bruce/Natasha relationship seemed to come out of nowhere, considering how little tension there seemed to be between them before this and how terrified Nat was of Bruce (because of the Hulk) in the first film. It starts to make more sense, though, when you realize that Nat is the sort of person to confront her fears and figure out how to use scary people to her advantage.
Ultron changes his goal from forcibly evolving humanity to simply destroying and replacing it after the second act of the film. However, he only did so after the twins abandon him due to horror at his planned genocide. Perhaps he realized that any humans who survived his meteor crash wouldn't be accepting of his plan and he needed to take more drastic action to achieve peace in the world.
As an expansion of the main page's entry, Ultron's birth and death are perfect Book-Ends.
Ultron is born. J.A.R.V.I.S. tries to reason with him, but Ultron attacks him, leading to J.A.R.V.I.S.' death.
Ultron's first body is heavily damaged, with a prominently missing left arm.
Ultron wins his first fight against the Avengers.
Ultron loses his final fight with the Avengers.
He is reduced to one body, which is heavily damaged, with a prominently missing left arm.
The Vision (J.A.R.V.I.S.' successor/next incarnation) tries to reason with Ultron, but Ultron attacks him, leading to Ultron's death.
The Ultron Sentries' lack of sturdiness actually makes sense. Not only did Ultron mass-produce them with a limited amount of materials in a short time-span, but they're meant to be nothing but disposable cannon fodder for Ultron's primary body.
Wanda is the one who influenced Tony's creation of Ultron, so she can be viewed as his "mother" in a way. Thus, Ultron's affinity for her could be viewed as the film's version of his Oedipus Complex.
Ultron and Vision both are created using the mind stone. However, Ultron comes out of Tony's incapability of dealing with fear and self-doubt, while the latter by his trust in J.A.R.V.I.S.' capabilities. The former is born from negative emotions and becomes a villain, the latter by positive ones and becomes a hero.
Wanda is shown flying only in her last scene, but looks quite distressed and not particularly good at it. Considering that only Vision's intervention spared her for dying from falling in Sokovia, it's likely something that just recently she started using, and she's still training. On a side note, why wouldn't she develop it sooner? She always relied on her brother's power for transportation, never needing to develop some of her own. Even in Sokovia, they planned on Pietro carrying her to bring both to safety. And now that Pietro is dead, she can't do it anymore.
Quicksilver's competence against firearms gradually worsens over the course of the film.
First, he manages to disarm Klaue and disassemble his gun without a shot being fired
While trying to prevent the Vision's birth, he is caught off-guard by Hawkeye firing a bullet upwards through a glass floor.
During the battle of Sokovia, a round fired by a police officer grazes his arm.
Finally, his heroic sacrifice involved soaking up minigun rounds aimed at Hawkeye
Vision is a literal Deus ex Machina; a god-like being given life by human technology.
Natasha calling herself a monster wasn't because she was sterilized, it was because of what she had done to get sterilized. After the Hulk's rampage in Johannesburg, one could understand why Banner wouldn't want to see "the other guy" as anything less than a monster, but really, the Hulk is more akin to a force of nature, like a tsunami or a hurricane. They both kill, but they are indiscriminate about it in their unstoppable rampage. Natasha considers herself more of a monster because, while she hasn't killed as many people as the Hulk likely did, she knew most, if not all of them, inside and out. Assassins pride themselves on getting to know their targets and their actions, to ensure success. Natasha would have killed a number of good people, and she would have to deal with ending them. In essence, the Hulk has the deaths of a thousand unnamed souls on his hands, while Romanoff has a hundred named souls on hers, which is arguably worse.
Rhodey's story early on has another purpose — foreshadowing the raw strength of the Iron Man suits. He says it can take the weight of a tank, and this is borne out in the climax, where Iron Man helps carry a full lifeboat full of people onto the Helicarrier. Also, on a more minor note, it might also be to establish that no amount of physical force or strength can lift Mjolnir if one is not worthy (as Stark and Rhodes use two Iron Man gauntlets simultaneously to no avail).
During Tony's visit to the Nexus, all the blinking lights in the background are either Ultron-blue or J.A.R.V.I.S.-gold, hinting at J.A.R.V.I.S.' survival.
Quicksilver's candy stealing isn't just to show his childishness. It's shown that he gets tired pretty quickly when using his powers. Candy contains sugar, which can replenish stamina. His fast movements are also akin to someone having a sugar rush.
Tony says that Thor doesnt get why the Earth needs a defense system. While all the Avengers are superhuman fighters, he is a legitimate businessman and so has a strong place in the civilian world, unlike the others (a demigod, a living legend, two master assassins, and a guy with anger management issues). So he can understand humanitys frailty and need for a security system better than his fellow Avengers. It's further cemented by his saying this to Thor, an Asgardian, who comes from a world which has a defense system that (until recently) hadn't been breached in decades, if not centuries.
Natasha's sterilization may have been about more than relieving her of the burden of pregnancy. She may have been trained to honey-trap her targets. Her organization may have even predicted that she'd eventually find herself up against an enemy who would be her superior in every way; an enemy who would not hesitate to rape her if he could. It's also possible that her training/sterilization could explain why she's has been written as a love interest in all her appearances, and also why trying to pursue something more than just flirting with Banner was so awkward: she's a completely broken individual. If she's not trying to kill someone, or seduce them for information, she literally doesn't know to interact with anyone. She knows how to fake being normal and well-adjusted, but deep down she has a thoroughly broken mind, which we got a terrifying glimpse of when we saw her nightmare of the Red Room. It's worse in the context that we've seen something like this before in-universe. Dotty Underwood in Agent Carter, also from the Black Widow program, was fully capable of behaving fairly normal, but once the facade was no longer needed she's revealed to be a deeply broken and unstable individual. Natasha is simply better adjusted, likely due to Clint and S.H.I.E.L.D.'s influence giving her a second chance.
Also, in both fiction and real-life, mothers have been shown to be willing to go to extraordinary measures, up to and including sacrificing their own life to save their children. If Black Widow were to become pregnant she might fight her programming and handlers tooth and nail to get her child to safety. It is possible that sterilization is also a way of hedging their bets to make sure nothing would supersede the Widow's allegiance to the Red Room.
The stinger reveals that Thanos is no longer willing to take a backseat in collecting the Infinity Stones. Vision has an Infinity Stone installed in his head, which means he's now on Thanos' hit list.
Natasha and sacrifice:
When the Avengers realize they might have to sacrifice themselves to save the world Natasha seems to accept it somewhat easily, saying "Where else am I going to get a view like this?" as a shot of beautiful clouds are shown. When you think of how her line and the shot are connected it implies that Natasha believes in The Nothing After Death or thinks she would be unworthy to go to heaven after she died.Fridge Brilliance in that the Soviet government was militantly atheist and that would have been part of her indoctrination.
Similarly, when she's asked if she wants to see if she can lift Mjolnir and responds that she doesn't need to know the answer, it's not because she doesn't want to know, it's because she thinks she already knows; the answer is "no".
When Hawkeye shoots out the glass upon which Quicksilver is standing, we are treated the latter's slow contemplation of the moving bullet. Since he was moving in super-speed while saving Hawk and the young boy, he must have felt every one of the dozen or so mini-gun rounds push through his body in agonizing slow motion.
This film adds a new level to how crappy things were in The Avengers (2012). That staff Loki was using? It's an Infinity Stone. And it was on loan from Thanos.
Banner was betrayed by his closest ally. Everyone knows that Banner hates turning into the Hulk; he doesn't even refer to his alter ego by name when he can help it. He's always been worried that someone will try to weaponize him. Natasha does both in a single move. The Avengers may have needed the Hulk to win the day, but the way she invoked the transformation was gut-wrenching. It's going to take a long time for Banner to trust anyone ever again; until then, he'll hide out in the small places of the world, hopefully never to be seen again.
Natasha: I adore you. [kisses Banner, then shoves him off a cliff] Natasha: ...but I need the other guy.
What's Banner going to think when he finds out that Scarlet Witch, who deliberately unleashed the worst Hulk rampage yet, has actually been accepted onto the team in his absence?
It's not a happy fate for Natasha either. When the chips were down, the world needed an operative and assassin more than a reformed agent. To that end, she betrayed him for all the right reasons, but it's still getting close to a mark and betraying him at the right moment like she's been trained to do all her life. In the end, she can't escape being a monster any more than Banner can.
Wanda set the whole plot in motion when she used mind control on Tony. Ultron, the weaponization of her hometown, her brother's death — all set into motion by her. If she hasn't realized this yet, she will later.
Wanda and Pietro's main hatred for Stark was rooted in a Stark bomb killing their parents and nearly killing them. This makes Wanda's Mind Rape of Tony understandable, if not justified, and played on Tony's ego combined with his fears and sense of responsibility. Going after Bruce, however, was a low blow, because she compelled Bruce to hurt many innocents, in other words doing exactly what Stark's brand proxy did to her and her family. She thinks this is okay but Ultron exterminating all of humanity isn't, and despite Bruce really wanting to make her pay for that, he has no choice but to accept her help because they need as many people as possible fighting the killer robot.
Considering this and all of this things mentioned in the example just above this one, it makes her breakdown in the opening act of Captain America: Civil War even more understandable.
Tony probably learned the twins' story, knows it was his weaponry (and centerpiece of his fortune) that set them on the path of Revenge, and is likely going to blame himself for it.
Bruce's gradual unhinging throughout the film is unsettling, especially after being afflicted by Wanda's powers in which he goes on a rampage throughout the city and nearly kills thousands of civilians. Later, when he and Tony are confronted by Steve, Pietro, and Wanda (the latter two who both went under a HeelFace Turn), Bruce outright states he is ready to throttle Wanda for mind-raping him, and that he is going to do it without transforming. When Steve and Pietro take on Tony, Wanda rushes to jump in until Bruce comes from behind and places her in a chokehold, then he invites her to do something about it. The implication seeming to be that if she hurt him trying to get out of it, he would transform into the Hulk while already tightly holding her neck and head. Pop.
Look at just how quick each of the Avengers becomes angry with one another, and without the presence of the Scepter to influence them, not to mention how fractured they are as a team.
Steve is becoming more and more of a Blood Knight because of HYDRA's continued existence, and true to their creed, cutting off one head, two more take its place thus far, meaning now he's always looking for the next fight, and if there isn't one or he isn't preparing for one, he feels he has no purpose.
Natasha is still haunted by her past as an spy/assassin, and the loads of horrible memories she has to deal with, that she feels at times as being the Token Evil Teammate, she'll never be able to have the normal life she wishes she could have.
Tony still hasn't quite completely gotten over the PTSD nightmare-inducing events of the Battle of New York, and is quick to try and take all of this on his own and make risky, misguided attempts at protecting others.
Thor is justifiably pissed that humanity is still trying to mess with powers outside of their control, that he's already seen them corrupt his adopted brother, while now also having to make sense of the vision of Hel, and the prophecy of an impending Ragnarok upon Asgard.
Banner will Hulk out if he absolutely must, but the events in Africa show that if he's brainwashed or Hulks out at the wrong time, innocent lives are put too easily in jeopardy and brings nothing but hatred and fear upon him and the team.
The only one we don't know for certain of, is Hawkeye, and that's because after the events of the first Avengers film, he possibly was put on long-term leave from S.H.I.E.L.D. to mentally recover. Now add the concerns about his family, and putting them in jeopardy or him dying are on his mind, while also trying to play the role of the heart of the team. And on top of all that, imagine what he went through if he received reports from Nick Fury, Maria Hill, Black Widow and other trusted allies about HYDRA hiding within S.H.I.E.L.D. while on leave, feeling as though it was another moment of him not being able to fight with his allies when he was needed most.
Thor was intending to take the scepter to Asgard, had Ultron not been created. knowing who's ruling Asgard, things may had not gotten pretty for the Asgardians.
Ultron is shown assembling his main body before interrupting the party... meaning he purposefully chose to assemble one out of all the damaged parts of the Iron Legion as the first one that'd have been seen.
While they were given a Race Lift, the fact that Wanda & Pietro, two characters who have always been Jewish-Romani and children of two Holocaust survivors in the comics, willingly volunteer for a neo-Nazi organization like HYDRA, is really disturbing!