Hawkeye will be killed off/retire
Without being harsh, Hawkeye seems to be the most useless Avenger. First of all he has no superpowers, which for a superhero team means he is quite boring. Secondly he got possessed by Loki in the first five minutes of The Avengers. Jeremy Renner says that we will get more back story to his character in Age of Ultron. That may be true but that certainly doesn’t mean the character is safe from being killed off. As the Avengers team increases, it is likely former members will be phased out. Age of Ultron is set to introduce Quicksilver, Scarlet Witch and The Vision – War Machine is also set to appear, so that’s four new members now. Is the team becoming too crowded? Maybe they should kill or retire a character? From the reception of the character from fans, Hawkeye is the favourite candidate to leave the team.
While other characters may be on their way out of the team in the near future, Hawkeye will surely depart the team soon. Either retiring or killing off a character is the option. If Hawkeye were to die, it would be far more dramatic and allow the other characters to have some greater development. This could change instantly if the character is given a bigger role when we next see him in Avengers: Age of Ultron. From early reports this may be the case but due to the fact that the team is becoming crowded someone has to go.