Re: Who dies?
I personally don't think they have the guys to kill off any of the Avengers.
They all are safe. If anyone does it will be secondary characters. Personally I would be pleasantly surprised if the killed of one Of the big guns. Also I'm not a fan of the James Bond recasting. Theirs plenty of characters to make this go on for a long time without having to watch Iron Man 21 or Thor 14. Also if you kill a character off leave them gone.