Re: Fanwankin' Time
As you know, you go to continuity with the Cheetah you have, not the Cheetah you might want or wish to have after a later reality rewriting crossover.
If we weren't dealing in distortions of what Perez presented, there wouldn't be call for fanwankin' and Grand Unified Theorizing and whatnot. You could just read about the Cheetah and there'd be the Cheetah, right there on the page.
Instead, you get continuity that looks, from a certain angle, (the fanwanker's angle) like a jumbled up puzzle waiting for a sufficiently clever soul to put together in a way that looks sort of like a Cheetah. It's a weird, perhaps twisted, way to approach inconsistency in fiction, but it's fun.
That said, the GUTC as initially formulated is flawed in that it back-propagates later, inferior material onto Perez' excellent run. Ideally, a theory should give Urzkartaga and the Cheetah-god sentient agency only when strictly necessary to explain observed phenomena.
As a refinement, I propose that Urzkartaga's sentience was precipitated by Dr. Psycho's attempts to initiate contact. While he thought he was merely finding Urzkartaga's mind, he was actually shaping it from the primal impulses which had previously constituted its total psychic existence. Thus, while Psycho is channelling Urzkartaga he identifies with it completely, and the newly sentient Urzkartaga picks up a great deal of Pyscho's rotten attitude and an anti-Diana grudge. Non-sapient Urzkartaga is maintained through Perez and Byrne, non-sapient Cheetah-god maintained throughout continuity.