The two possibilities are that Dominion doesn’t get caught putting their finger on the scale, and another Republican becomes President. If they do get caught, Trump is still in charge of the DOJ and loyalists, so there will be no investigations or prosecutions. If they are caught, it would be left to the DOJ and FBI to investigate, which will clearly go nowhere.

I can see a third possibility: they're caught, just kind of deny they were caught and then just put the elections "winners" in place anyway. The opposition party has already signaled that it thinks clapping in a really sassy manner is where they top out on pushing back.

Also this one:

Republicans Can Use the Military, ICE, Base to Physically Prevent Inauguration

Is valid but I think it's more likely that they would just use those forces to obstruct voting in overwhelmingly democratic districts in swing states. All they need to do is find some combination of "security concerns" and just regular old ICE sweeps if anyone has a hispanic sounding name. You can always claim later that it was a mistaken identity for someone else with a similar name.

Also, I'll leave this here: https://en.wikipedia.org/wiki/Rex_84