My Paper Heroes is a fantastic repository of easy(ish) to make paper superheroes thanks to the clever work of Mr. Xavier Gale-Sides. He's created a lot of X-Men in the past, but his current project is a full set of move-style Avengers, releasing regularly. In fact everybody except for Iron Man is already available. Check out these three to prove that I'm not making this whole thing up:
I want to make some of these so bad that I might actually change the cartridges on my creepily dusty printer. (I actually even have spare cartridges. I'm just really lazy).