In the comic they send The Hulk into space because he's to much of a risk but wat if they flip it n b4 the battle wit Ultron Banner had a talk wit Nick n told Nick that if given the chance to send him out of the planet because he felt he would alway b a risk ! Now we all kno Nick is good at doing shit like that n sends the ship the hulk was on into space but tell Black Widow he landed in the Fiji just to set her mind at peace . But he's really sent out n there u have the intro to Planet Hulk !!!!