Suggested by Rookie
Mysterious forces forced Tzeentch to send Magnus the Red (Warhammer 40K) to destroy Republic City from Legend of Korra. Tzeentch sensed a trap and although he was unable to send his own daemons to help Magnus, he hired two members of the Endbringers team, Leviathan and Behemoth (both from Worm, first time here), to help Magnus.
Everyone is at their prime, so let the battle begin.
Who will win?