Reason it's easy to get over the Hulk is cuz there's been less Banner when he shows up. Banner is no longer a focus really.
It'd be the same thing if they killed IM the hero off.
I'd be happy if Marvel tried to pull off killing Cap in Cap3 and IM in A3.
Did see this today though:Robert Downey, Jr. Claims No Plans For ‘Iron Man 4′
Chris Evans Won’t Be Hanging Up Shield With ‘Captain America 3′
“There isn’t one in the pipe,” Downey told Variety. “No, there’s no plan for a fourth Iron Man.” “It’s down to Kevin [Feige, Marvel Studios president] and Ike [Perlmutter, CEO of Marvel Entertainment] and Disney to come to us with what the proposal is, and that’s on us to agree or disagree.”
“Not yet,” he said. “I have a few more [Marvel] movies I have to finish first, which I’m happy to do. I’m sure it’ll happen at some point. All good things have to come to an end. But I’m really happy playing the character. I’m honored to be part of the Marvel Universe for now.”