Of course, this is likely because Phase Four's film schedule would give away the events of the next two Avengers movies. Contracts are up for the most of the original Avengers, leading many to believe that at least one character isn't going to make it out of the battle with Thanos alive. In particular, it seems like either Iron Man or Captain America won't make it out alive, as both Chris Evans and Robert Downey Jr. would need to re-up their contracts for Phase Four.