Similar third acts

Whenever I see a comic book movie, I expect action. And most of that – at its most intense – comes in the third act. So, from this point of view, I already know that the villain and the hero won’t fight until the very end (or, if they do before that, the villain will have the upper hand). And then it all ends, with the villain obliterated (most of the time).
So I shouldn’t even mention this – but it is still something some naysayers complain about. And while some of the issues deserve an explanation, it seems a waste of time with this one.
Nonetheless, here it goes. So all the destruction comes in the third act, when the hero battles the villain. But, even so, the writers and the directors always find a way to own that fight. Ant-Man is a great example for this. For that matter, even Thor: The Dark World was amazing, with all that hopping around between worlds.
So while this is a general rule for all the movies (to have the big fight in the end), the endings of the films are in no way similar.
