About a month ago, the rumors began to circulate that the ending of The Avengers sequel would see the Hulk being abandoned in space and would be followed by a solo Hulk film inspired by the "Planet Hulk" storyline. Many have already disputed the legitimacy of these rumors, but the ultimate source on its truth has spoken, The Avengers 2 writer and director Joss Whedon.
When asked about the rumors in an interview with IGN, Whedon said, "Well I’m really not supposed to comment, but no, that’s nonsense."
Straight from the horse's mouth, no dice on "Planet Hulk," sorry folks. Whedon would in fact know because he already has an outline written for The Avengers sequel and says the script should be done in a few months.
The Avengers 2 will hit theaters on May 1, 2015, and while the cast is currently unconfirmed, its very likely to again include Robert Downey, Jr., Chris Hemsworth, Chris Evans, Jeremy Renner, Mark Ruffalo, Scarlett Johansson and Samuel L. Jackson.