Marvel is rumored to be hiring Josh Brolin for Thanos as the mega-villain for their cinematic universe. This means Guardians of the Galaxy & Avengers. Both are super teams.
Fox has teased a mega-villain for the X-Men super-team to go up against in their latest movie. FYI, X-Men: Days of Future Past has a post credit scene. I think Fantastic Four is also being rebooted. Yes that is a super-team as well.
DC still playing catch-up but they are going in with the heavy hitters Bats & Boy Scout with a rumored Amazon in the mix. We all know the goal is the Justice League super-team
Meanwhile, I think Sony is in trouble. Right now they have the "Web Head" going up against multiple villains and the formula is kinda stale. Franchise fatigue not withstanding, our favorite web slinging, trash talking super-hero has the "Sinister Six" super villain group to fight but who can he team-up with licenses permitting?
Black Cat (teased in ASM2)
I think Sony should pick a female super hero because this adds more tension with Spidey's love interest Mary Jane Watson.
Cap 2, would not have been as fun without Falcon or Widow for him to interact with. The days of the super hero movie have passed. It's all about super-teams now.