[user104658]

People seem to think ther 's going to be loads of deaths but I doubt it. I can see hawkeye either dying or quitting... good chance Vision will die when the infinity stone is plucked from his head, though I'd say there's a chance his body / mind will survive but without his powers (he might end up basically human, so not dead but pretty useless as an avenger). There's a rumor that Stark loses an arm (based on some early artwork that shows an Iron Man suit with a huge cannon type gun where one arm should be) so he might retire / pass the Iron Man role to someone else. I highly doubt Thor will die, and there's also talk of a Black Widow standalone movie so she's probably safe. Ant Man has a scheduled movie so is safe, as is Spider-man, obviously, Sony would never allow the death of Spidey - their franchise has only just started! Black Panther 2 also announced. And I can't see any of the GotG dying either, especially as they're likely to make up the "lighter side" of the film.

We might lose some "sidekick characters" I guess.

Cap... Is probably going to die, in a mirror of Coulson's death in the very first Avengers, with his death being the thing that rallies everyone to fight together. Bucky will take on the Captain America role but I would also NOT be at all surprised if Steve appears again somewhere further down the line (in a future single character movie or Avengers) and is not actually dead.