That's right - another thread related to the Avengers movie. And why not? The movie is awesome!
It has been said many times that the movies draw a lot of inspiration from the Ultimate Universe. In fact, it's this connection that got me started on the Ultimate books (and comics in general, really). However, the movies obviously draws from all sorts of different source material from the past fifty years. But what comes from the Ultimate Universe?
It should go without saying that there are, indeed, SPOILERS! below.
Before Ultimates, SHIELD was a group of spies. Ultimate SHIELD is responsible for preemptively putting together a ragtag group of Earth's Mightiest Heroes to become the Ultimates. This MO is very much like how the Avengers are put together in the film.
The appearance is an obvious connection. But really, he acts a lot like Ultimate Fury, too. He's in charge of the Avengers, running things from behind the scenes. He's also manipulative, lying to the team about the circumstances of a friend's death to convince them to come together as a team. He's not just in the background of everything, he's leading the fight.
I'll admit that most of my 616-Iron Man reading has been from the post-alcohol days, but Robert Downey Jr really seems to embrace Mark Millar's playboy Stark from Ultimates. He's very eccentric and rarely seen without a drink in his hand. Though, his origin is clearly not Ultimate.
He uses a gun!!!
The costume is an obvious nod to the Hitch designed Ultimates outfit. He's also seen as Fury's right hand, and he always gets the job done. I'm hoping Avengers 2 has a fingernail scene.
Other bits and pieces:
-The Chitauri. Sure, it was in name only, but it's still from Ultimates.
-Cap's trading cards. Straight from Ultimates.
I'm sure there's some stuff that I'm missing.