Rabum Alal is Herr Totenkopf. He's the Wizard of Oz. Whoever set all this in motion -- Isaac Newton, probably -- has been dead for some time and everyone else is carrying on in his name. He's dead, because everything dies, and the multiverse is dying and ideas are dying.
The Avengers have been fighting to stop a dead man for a very long time.
And there's no stopping what's been set in motion.
Additionally, the Rogue Planet will become Battleworld.