Board Thread:Fiction Universe Discussion/@comment-1370845-20180127221921/@comment-24492318-20180128105328

One possible solution is to have an 'anti-Annihilation', so to speak. Not just a "Hey, the other galaxies are in the sky again, what the heck?" moment, but gradual discoveries to hint the Annihilation's destructive effects are fading, as the Xhodocto put their attention elsewhere, allowing the damage to slowly be undone, and for new galaxies to effectively fade back into existence.

It's wildly different from Wormy's idea, and my knowledge on the event is hazy at best (It still doesn't have a very detailed page), but it could work.

Or alternatively, we use a 'Second Gigaquadrant', and uncover some kind of precursor tech that allows travel to it.