The Avengers (2012)

[Chainsawmidget]

I don't think he's any more random than Arnim Zola or Iron Monger.

[HappyGilmore]

So, 2015 is the projected sequel to this. Not quite sure what Downey's contract states, but I think he only owed Marvel IM3 left, which is out soon. If so, that could give him some bargaining power if they want him for cameos in Avengers spinoffs upcoming as well as Avengers 2.

Ruffalo impressed Marvel enough they gave him an 8~film deal (I assume this includes at least one Hulk only film, Avengers 2, and possibly cameos in CA2, Thor 2, etc.)