This wikia's cosmologies are entirely subjective; they all exist simultaneously, regardless of logical structure.
And that's about it.
If you want a constant stack of ever-more-abstract structures ascending past imagination and reason, go for it. If you want the Box to be the highest level, you can stop there. If you want the Omniverse to be the highest level, you can stop there. If you want the universe (ours) to be the only -verse that actually exists, you can do that.
We do try to share our cosmologies to some extent on this wiki, but if there are contradictions, you're free to branch off and make your own little world.