The only thing I can predict with any confidence is that there will be a GOP coup attempt if Trump loses.
Whether it will be a violent uprising, a well-organized political movement, or a fractionally-assed fecal fireworks display that makes their last coup attempt look skilled and clever in comparison, I have no idea. And where they go from there, I have even less of a guess.
The best plausible case is probably that we start to see something of a split between the mad Trump losers and the Republicans who actually give a damn about something beyond their Mango Messiah's most recent bout of glossolaliac incontinence. But who knows what they're actually going to do - they certainly don't. (Beyond denying reality of course - that's guaranteed. Even if Trump "wins", they'll lie about the details of the win.)
That is exactly gonna happen when Trump loses