Depends on how committed the 2nd Trump regime would be to maintaining the fiction of democracy. My intuition is that Trump won't deny himself any opportunity to lord it over his enemies, so it'll be hard to restrain him from any authoritarian demonstration.
Never really believed that Trump would cancel an election, because a) holding his rallies is obv biggest thrill he's ever had; b) no election means he can't brag about beating someone. I think Trump will run for a third term, and declare himself the winner as soon as the East Coast polls close.