Alcoremortis
Member
I actually think, that at least Tony Stark will die.
But maybe, he will even die in the end of Avengers 2, maybe Ultron findes some way hack of his suit and kills him and making some kind of Star Trek 2 situation. Joss Whedon already said, that he thinks the second part of a triology needs to be the darkest.
The main plot for Phase III will be the hunt after the Infinity Stones and the Infinity Gauntlet with the goal to bring Tony back to life. And this brings the attention of Thanos back on earth again.
I dunno. I think they've been setting up really well for a Civil War type story. I think Age of Ultron will end up with everyone hating each other and then start taking sides on the whole registration thing in Avengers 3. Duking it out amongst the team while Thanos grabs all the Infinity Stones in the background. And then suddenly, they'll have to abandon their individual problems to join up together again and fight Thanos.