Re: Who would you let Joss Whedon kill in Avengers 2?
I would think they have to kill one of them in Avengers 2. Or at least make them disappear.
Iron Man - too cool to kill
Hulk - becoming popular, safe for now
Thor - every movie needs a comic relief
Cap - of the main four, he is the most vulnerable. Already mentioned, he has a suitable replacement.
Black Widow - the only female superhero, so safe
Hawkeye - likely to die
Nick Fury - very likely to die
Maria Hill - her death wouldn't really matter much
Also, I think the decision will also come down to the actors. Yeah, many are still under contract, but I can see if someone starts frequently expressing snarky/ill comments (maybe they've gotten too big or just bored with the role) it might factor into the decision of getting rid of that character.