The Avengers are Marvels biggest team, and most of the universes characters have joined The Avengers at one time or another. But one of the best part-time members is Spider-Man, because hes arguably the biggest property when solo. Plus, he never really seemed like one of the team. He still maintains that fish-out-of-water feel that makes him so relatable. Hed be as pumped as meeting Captain America as we would be, essentially. And some rumors floating around hint that Spider-Man could be in the next Avengers movie. Its all based on Andrew Garfield holding a stack of Avengers comics concerning Thanos, the rumored villain for the next movie. The presumption is its for research, but he may also just really enjoy comics. Of course, the biggest obstacle would be the negotiation problems between Marvel Studios (Avengers) and Sony (Spider-Man).