http://www.slashfilm.com/joss-whedon...he-avengers-2/

Breaking news: It was just announced on the Walt Disney Investors Conference Call that Joss Whedon will return for The Avengers sequel. Whedon is signed to both write and direct the upcoming sequel. Disney confirmed that Whedon is also involved in the development of the previously-rumored long-lead ABC live-action television series which will be set inside the Marvel cinematic universe.

The Avengers is being tentatively planned for a Summer 2015 release, although Disney and Marvel have not formally announced a date.