Final Fantasy 7 Rebirth Ultimania Confirms There Are Multiple Universes

thegamer.com:

If you've finished Final Fantasy 7 Rebirth, then you'll know how weird and wonderful the story gets with its multiverse shenanigans. You need a lot of free time and red string to actually follow the events of the latter half of the title, which was delibreately left open to interpretation to get fans theorizing about what exactly could go down in Part 3, whenever it releases.

Thankfully, the release of Final Fantasy 7 Rebirth Ultimania - a tome of information regarding the title and Square Enix's future plans - has cleared a few things up. Translated by Twitter user Aitaikimochi, Ultimanium has confirmed that there are indeed multiple universes in the game, and that we switch back and forth between two of them to experience the trials and struggles of Cloud and Zack.

In the book, Final Fantasy 7 Rebirth writer Kazushige Nojima explains that there are multiple worlds in the game, and not just the two that we actually see. It's all a little bit confusing, but it does sound like we'll be getting some answers in Part 3, as Nojima has promised that the game will address the whole "multiple universes" thing, as well as the mystery surrounding Aerith and her White Materia.

Ultimania goes on to explain that there's a very easy way to tell which world we're in at any given time, and that it's all to do with the breed of dog of Shinra mascot Stamp. This has been a fan theory since launch, as Stamp is a terrier in Zack's world while he's a beagle in Cloud's, but it has now been confirmed as an accurate indicator for each world. The book also states that there are more than the two worlds we've seen so far, with Yorkshire Terrier, Pug, Corgi, and Chihuahua versions of Stamp too.

Adding the world we see at the end of the game that potentially doesn't have a Stamp, that makes seven different worlds that Rebirth has set up, a very fitting number given the game we're talking about. How Part 3 plans on making all of this understandable and wrapping it up into the story is