Ultimate Galactus vs Apokolips...
The planet Apokolips and all its major denizens (Darkseid, Desaad, ect) learn that Gah Lak Tus has targeted them and is on its way to destroy their world...
Apokolips combined has one week to prepare for Gah Lak Tus...
As with Earth, Gah Lak Tus's Silver Surfers have been secretly converting significant portions of the population to accept death (so that they wont resist when Gah Lak Tus arrives to destroy them) for several years...
Who wins?