What would be your educated guess as to what happened to Lord Vivec?

I am sorry if anything similar was posted recently. Question is simple, since we don't know what happened, I would really like to hear your theories on what could have transpired after he lost his divinity. And how does the fact that he achieved CHIM account into all of that? Shouldn't he technically still be a god, since he rewrote history to be a god from the beginning? Or not? Fuck, I'm confused.