Predictions: High Evolutionary is not the big bad, and maybe isn't even a villain at all. Halfworld is a half prison/half mental hospital with one patient/prisoner, The Beyonder, the villain of the original Secret Wars (the sub-title of the upcoming Avengers movie) who has the power to ... basically rewrite the universe as he sees fit. Rocket did not "escape" Halfworld, like his comic counterpart he left and had his memory erased, all voluntarily, to prevent the Beyonder escaping at some earlier point (the mechanics of how this works I'm not speculating on now). The scenes of baby Rocket cowering in the cage are red herrings; he was scared at first (who wouldn't be?) but had accepted his role in Halfworld before the emergency that caused him to leave happened, and was maybe even relatively happy.
Predictions: High Evolutionary is not the big bad, and maybe isn't even a villain at all. Halfworld is a half prison/half mental hospital with one patient/prisoner, The Beyonder, the villain of the original Secret Wars (the sub-title of the upcoming Avengers movie) who has the power to ... basically rewrite the universe as he sees fit. Rocket did not "escape" Halfworld, like his comic counterpart he left and had his memory erased, all voluntarily, to prevent the Beyonder escaping at some earlier point (the mechanics of how this works I'm not speculating on now). The scenes of baby Rocket cowering in the cage are red herrings; he was scared at first (who wouldn't be?) but had accepted his role in Halfworld before the emergency that caused him to leave happened, and was maybe even relatively happy.