Originally Posted by
Restingvoice
At the end of Convergence some heroes went back in time to prevent Crisis on Infinite Earths and all the Earths have a new story as their ending. Pre Crisis Starfire married Nightwing, Post Crisis Nightwing married Oracle, and so on. Those are the final story for those old Earths. After that they evolve into the New 52 Multiverse.
Basically they're creating a new, different ending, instead of abruptly getting destroyed or transformed into New 52, but after that, the New 52 Multiverse is still the only Multiverse and the New 52 story is the then current story.
Doomsday Clock restored The Kents, the Legion and New Earth JLA, then add a new thing: The Metaverse, a concept where the universe adjust itself around Superman, and every time the universe changed, it creates a sort of archive to preserve old stories and old Earths.
Since the history of the main Earth now has the Kents, JLA and Legion restored, the New 52 as it was became an old, archived Earth in the Metaverse. Some stories of New 52 are still canon in this new history, and The 52 Earths are still the only Multiverse
Oh yeah, because of the way the Metaverse concept work of preserving history, it also restores Crisis on Infinite Earths in the history of the Earths where it happened (New Earth history, Rebirth history...)
Multiversity is based on New 52 Multiverse, but as mentioned earlier, also revealed that the old Pre-Crisis Multiverse, has debris and remnants that the Empty Hand's minions feed on, the Multiverse-2.
Death Metal destroyed The Source Wall surrounding the 52 Earths, opening up the Multiverse to the Omniverse, who knows how many and what kind of Earths are out there, but eventually, Barry found Multiverse-2
Finally, during Dark Crisis, Pariah brought back the Pre-Crisis Multiverse, and after the end, they stop limiting the main Multiverse to just 52 Earths and began adding more, some old, some new Earths, with some new numbering, as the new, infinite Multiverse
It's not the same as the original Infinite Earths because of the new naming system, and the main Earth is still the current one, not Pre-Crisis Earth-1 or 2 or New Earth or New 52 Prime Earth