The War Is Far from Over Now by Dont_call_me_Carrie is an awesome AU that takes a a sharp turn right after Iron Man3, and the results are just glorious.
Author's summary: The world keeps pushing him, demanding, because what he did wasn't enough. Genius, billionaire, playboy, philanthropist, but that wasn't enough, wasn't ever enough. Tony Stark was tired. But he had a planet to protect, even if everyone laughed at him whenever the prospect of alien invasions was brought up. He could count on one hand how many people he could trust, which was disheartening but then, what else was new?
Or,
In which Tony does not, in fact, intend to take over the world.
...unfortunately, everyone else missed that particular memo.
[gradual divergence from canon, starting at the end of Iron Man 3. In which it's Tony's self-awareness, rather than his support system, that becomes a cryptid sometime during Phase II.]