When the Father talks about creating life without death and his and his children's nature as Celestials, only the reader would recognise the references to the themes discussed in Eternals.
In Chapter 78, the Darkhold suddenly combusts and destroys itself for no obvious reason, confusing both Robbie and Wong who watched it happen. Readers who watched Doctor Strange in the Multiverse of Madness would recognize this as the moment that Wanda seemingly sacrificed herself to destroy every copy of the Darkhold across the multiverse.
Bilingual Bonus: Peter Quill's home planet, the Earth, isn't called this way by the Guardians of the Galaxy and all the MCU's galaxy residents - instead, it's called Terra, Earth's name in Portuguese and Italian.
While the Peter/Ahsoka/Barriss trio is universally well-liked, the apparent decision to make them a threesome is garnering more mixed reactions from reviewers. Some think it makes sense given their interactions and like the sense of balance the three provide each other. In contrast, others would prefer they remain friends or pair Peter with only one of the girls, finding the throuple aspect unnecessary or even out of character.
As of Chapter 115, while the ship still isn't well liked by everyone, many readers have become at least more accepting of it, with several heart-to-heart scenes between the trio and their unconditional mutual support towards one another playing a big role in making the relationship a bit more believable and investing.
This version of Peter ended up joining the lines of Spider-people in Spider-Man: Into the Spider-Verse. Some have been anticipating it and are excited to see how he'll affect the movie's plot, while others think that it is an unnecessary distraction from the main story with little to no foreshadowing.
Complete Monster: Ultron is a rogue, genocidal AI that decided the only way to achieve peace would be the extinction of all life. Upon being sent to the Galaxy Far Far Away alongside the Avengers, Ultron decides to restart his genocidal campaign on a universal scale. After launching an all-out, full-scale attack against all factions of the Civil War, Ultron attacks several planets and slaughters all of their inhabitants before revealing his master plan: an Assimilation Plot where he has been kidnapping and experimenting on both clones and Jedi to forcefully convert them into sentry/human hybrids using kyber crystals, while also killing and reviving his subjects until he gets his intended results. When Ultron invades Kamino, he forcefully converts Clone 99 and broadcasts the event to the galaxy in an attempt to drive them into despair before killing them, and bombards the planet with anti-matter bombs, killing all life on the planet. Even upon defeat, Ultron refuses to see the error in his atrocities and states that his only regret is not witnessing whatever horrors the heroes will be forced to go through in the future.
Crosses the Line Twice: Ahsoka being possessed by the Son isn't funny. Her going full yandere on Peter and trying to kill him when he rejects her? Also not funny. But the other heroes joining the battle, only to be thoroughly perplexed by Ahsoka screaming her head off about Peter "betraying" her and wanting to kill him and Barriss (who isn't even on Mortis right now) while an embarrassed Peter keeps dodging their questions? THAT is funny.
Escapist Character: While his comics self is already this to an extent, Infinite Wars Peter takes it to a new level. Let's see: An ordinary nerd kid from Queens who gains superpowers, not only gets recruited to join the biggest superhero team in the world, but also becomes mentored by his personal idol. It escalates even more after he is transported to the Galaxy Far Far Away, where he also gets to live the dreams of any Star Trek fan by going into amazing (even if extremely dangerous) adventures, becomes a hero known across multiple worlds, not to mention falls in love with two beautiful girls, who also happen to be pretty badass on their own rights. No wonder Peter is a fan favorite character amongst the readers.
Growing the Beard: Phase One of the story (chapters 1-21), while it has its moment and a fairly strong start, plays it a bit too safe due to the Avengers' presence not changing much overall from canon. Phase Two (chapters 22-50) mixes it up by introducing more changes to canon, more internal conflicts between the heroes and villains, and introducing new factions to the war like Ultron and the various Mandalorians. And Phase Three (chapter 51 onwards) seems to be taking it even further, with even the Earth-centric chapters getting some crazy crossover action.
Hope Van Dyne in this story became an Avenger and went missing along with several others. Hank is currently working with the remaining Avengers to try to find them. Marvel’s What If…? (2021) showed an alternate reality where Hope joins SHIELD and dies on a mission, causing Hank to go mad with grief and murder the would-be Avengers in retribution.
While in this story Shuri becomes the Black Panther as a stand-in for her brother T'Challa during his stay in the Galaxy Far Far Away, in the canon the transition was brought only because of Chadwick Boseman's untimely death.
After meeting Wanda Maximoff, some members of the Jedi Council fears that she could fall to the Dark Side of the Force, thanks to the chaotic nature of her powers and her affinity with the Nighsisters and the Dark Side in general. Fast-forwarding three months later, and Doctor Strange in the Multiverse of Madness reveals that canon Wanda, in fact, went rogue and began a multiversal hunt for America Chavez in her desperate wish of reuniting with her sons.
Heartwarming in Hindsight: Just like in canon, Shuri takes on the role of Black Panther in her brother's absence, albeit in this case only because T'Challa isn't on Earth rather than because he's dead.
A darker kind of hilarious, but in the Zombie-themed What If…? (2021)episode, one Running Gag involved how Peter Parker seemed to be the only Genre Savvy hero in the zombie apocalypse. By contrast, during the Rakghoul outbreak, all involved characters swiftly compare their enemies to zombies and make it a point to avoid being at risk of being bitten.
One of the plot threads involves the Guardians of the Galaxy looking for another of Ego's children, eventually revealed to be Asajj Ventress. The concept of Peter Quill having a half-sister became canon in The Guardians of the Galaxy Holiday Special, during which Mantis reveals to Quill that Ego is her father. It would come full circle when the authors also incorporated said revelation into the story.
One True Threesome: After spending some time dancing around the issue by having the three spend time together and the girls admitting to greater-than-friendly feelings for each other and Peter, Chapter 73 sees Ahsoka (albeit corrupted by the Son's influence) admit that she wants Peter and Barriss, prompting Peter to realize that he feels the same (even if he refuses to do anything while Ahsoka's in her current state). The two affirm their feelings for each other once Ahsoka is back to normal during a visit to Tatooine in Chapter 74, but she reminds Peter that they still need to talk with Barriss about this; Barriss is officially brought into the relationship in Chapter 85.
