I’m talking about a fan theory, that if true doesn’t drastically upend the fundamentals of the fiction it is set in.
Mine is that in the American Dad episode ‘Can I Be Frank With You’, that Snot’s uncle is actually just another Roger persona. He appears suddenly and conveniently to pitch a bizarre scheme, he loves hanging around with teen boys and doing drugs, and the very instant that the plan has a setback he kills himself out of sight of everyone else. That’s just Roger in a suit and glasses.
Edit: Ok, so, people are having trouble with the word “inconsequential”.
Sisko was killed in TNG’s universe. Sisko survived in DS9’s universe due to the prophets saving him. The Trek universe diverged at Wolf 359.
The Dominion War has drastically different outcomes. Existential crisis in one universe where Sisko does a lot of meddling; barely mentioned in the other.
The biggest change to the cast is that Worf marries Jadzia Dax and becomes Ambassador to the Klingon Empire in one universe; in the other universe, he does a brief inconsequential stint at DS9 (without Sisko), never marries, then returns to the Enterprise E as pretty much the same character from TNG, and at some later point, he gets the Enterprise E destroyed.
The Picard timeline is set in the universe where Sisko died at Wolf 359.