I doubt it will happen for a couple reasons
1) trumps age - he will be 78 by then
2) the "magic" of trump will have faded significantly over the course of 4 years. It takes a sizable amount of energy to be in a cult and I suspect many people will start realizing how bad he is. The whole "hindsight is 20/20" thing
3) he is likely to be mired in a ton of litigation and felony charges. I believe there are many people eyeing the election results for this
4) post-removal of office, Trump is going to make himself look dumber with the Tweet storms that are sure to follow.
5) Melania is probably already eyeing her escape
I am sure there is more, but once out, I sincerely doubt the Republicans will want him back. He would be more baggage than he is worth.
Most of that is wishful thinking IMO.
This isn't driven by the magic of Trump. He is just a figurehead for something that has been long festering in Republican base. A group that has been fed a steady diet of conspiracy, lies and misinformation by outlets like Fox News and now worse on the internet, and no longer have the capability to differentiate between reality and the fantasy bubble they live in. And it isn't fading. It's feeding, and growing inside that alt-right, anti-reality bubble.
Whether it's Trump or a new demagogue, that takes on the leadership Mantle of the crazies, there is no moderating or turning back. Now that they have been shown that common decency doesn't apply, and that they can lie constantly, cheat and abuse, and win doing it, this will be the way of the Republicans until some major crises forces a reset. Something way beyond COVID 19.
Joe Biden is just barely beating a lying, malignant narcissist, that was destroying the country, and he will be 81 in 2024, and he will have the enormous task of digging out from COVID 19 mismanagement while dogged by Trump, and his followers until that mantle is passed or not.