Have any of these huge theories ever been confirmed or denied by the creators? If not then I'm guessing that they're all amused by it because somehow it's really:

Zell = Ultimecia
Rinoa's dog is actually Rinoa from the future turned into a dog
Raijin and Fujin are robots
Squall has multiple personality disorder and the other personas are Seifer, Laguna, Kiros, and Ward
None of this is real, it's just a sick story compiled by Cid and Edea. Whenever they had writers block, they threw in whatever the kids in the orphanage were yelling that day. For example: MOOMBA