Even with more than 3 hours in duration, Avengers: Ultimatum could not count on the presence of all the characters of the MCU.
Check out 15 beloved Marvel characters, including heroes and villains, who did not participate in the completion of Phase 3 of the MCU.
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The space kitten stole the show in Captain Marvel, and his absence in Avengers: Endgame was certainly felt. The explanation for the feline's disappearance is quite simple; Avengers: Endgame was filmed before Captain Marvel, and at the time, producers still didn't know Carol Danvers's pet would be so successful.
Martin Freeman's character appeared in Captain America: Civil War, and played a very important role in Black Panther. However, the Avengers: Ultimatum storyline did not need Everett Ross's presence, as his assignments would make no difference in the battle against Thanos.
The last time Sharon Carter participated in an MCU film, the romance seemed to be in the air between her and Captain America. Avengers: Ultimatum chooses to revive Steve Rogers' relationship with Peggy Carter. Thus, the presence of Emily VanCamp's character could cause some discomfort in the hero.
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Like Everett Ross, an appearance by Erik Selvig would not bring the Avengers so many benefits. As at the time of the trip to the past, the group already knew what they had to do, there was no reason to contact the scientist.
Peter Dinklage's character was still in possession of the mold used to create the Infinity Gauntlet. It is strange that in Avengers: Ultimatum, the heroes do not think about contacting the dwarf. Probably, Eitri's absence in the film can be explained by commitments from Peter Dinklage, busy recording the final episodes of Game of Thrones.
The heroine played by Jaime Alexander has been missing for some time. She did not appear in Thor: Ragnarok or in Avengers: Infinity War. In addition, the warrior did not participate in the battle in Avengers: Endgame. Probably, the character does not appear in the film due to the schedule of her interpreter.
The villain is mentioned briefly in Avengers: Endgame when Howard Stark meets his son. However, Zola's presence in the film would further stretch the budget, which was already exceeding stratospheric limits.
During the final battle of Avengers: Endgame, countless heroes try to stop Thanos' plan. However, Nova Corps troops are not present. Probably, the Titan had already slaughtered the organization when he decimated Xandar. However, the fate of the troops was never officially revealed.
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Skrull played a very important role in Captain Marvel. However, as the character is one of the youngest in the MCU, his presence should be further explored in the future of the franchise. Since Avengers: Endgame was recorded before Captain Marvel, few characters from the second film appear in the first.
Carol Danvers herself has little screen time in Avengers: Endgame. However, the heroine's reaction to finding out about the state of the earth is a little strange. She doesn't even think about knowing what happened to her best friend and her daughter. Perhaps the narrative will be further explored in the future of the MCU.
The Avengers came together in reflection of Coulson's death, and his name is not even mentioned in Ultimatum. The absence of the character can be explained by the events of Agents of SHIELD, a TV series starring the character of Clark Gregg. It would be very difficult to incorporate Ultimatum events into the series.
The iconic character of Samuel L. Jackson is one of the victims of Thanos' crack in Avengers: Infinity War, and makes a brief appearance at Tony Stark's funeral. Apparently, Doctor Strange estimated that the skills of the SHIELD leader would have little impact from the final battle against Thanos.
Lupita Nyong’o's character was not among the Wakanda warriors who came to fight Thanos' armies in the final battle. It can be concluded that the heroine was one of the victims of the Snap or just chose to stay in Wakanda and wait for the outcome of the war.
When Scott Lang finds his daughter, there is no sign of his mother or stepfather. There was no real reason for the characters to appear in Avengers: Endgame, and their absence can be explained in the next Ant-Man movie.
Many fans theorized that Avengers: Endgame would feature a brief appearance from Annihilus or some reference to the entry of new hero teams into the MCU. However, this did not happen. Probably, the mutant gene should be mentioned in the upcoming film The Eternals.