I say yes they'll never let him get the nomination again.
Interesting take from you. Why do you say that? If much of the base thinks the election was rigged then the whole 'loser' perception is invalid to them and they'll vote for him again.
I'll say this, I certainly want the GOP to move on from Trump, but I don't suspect they will. Much like the Democrats, there are much better people for the presidency than the people that have been nominated/won elections. And you can still have a Trumpian party on policy with a tough 'says it like it is' sales pitch without the 4th-grade vocabulary, narcissism, petty Twitter posts, and the other negatives that goes along with Trump the person. That's just my POV though.
I don't know I feel they are going to try to stop him from getting the nomination if he runs