Kevin Feige confirms the news of Whedon's involvement in Captain America 2 to the Collider.
"The Russos directed one of [the post-credits scenes] and Joss Whedon directed the other. I think you can figure out which," Feige said.
Speaking of which post-credit scene, details have already hit the net. Obvious spoilers.
The Avengers 2 has already begun filming with scenes shot in South Africa. South Korea looks to be next on the agenda.
Captain America 3 has been greenlit with Anthony and Joe Russo returning to direct. Chris Evans will most likely be back as well as Evans still has two more movies following The Avengers 2 on his contract.
Captain America 2 hits April 4th.