Is Marvel Setting Up A Massive Villain Team-Up For A Future Movie?

Although certain villains in the Marvel Cinematic Universe have joined forces in the movies, there has yet to be a grand evil team-up akin to the heroes forming the Avengers. However, a new video plugging the home release of Avengers: Age of Ultron has us wondering whether the studio is planning on introducing a certain team of evildoers from the comics for one of their future movies. In this featurette, titled "Connecting the Universes," it's noted at the end that Ultron and Ulysses Klaw (spe...