Honestly I don't see the Prime Timeline coming back. I have yet to see a franchise that has a continuity reboot go back to the previous continuity.
It looks like Universal is going to do just that with The Legend of Conan
, but it's certainly pretty unusual, and I wouldn't expect it to happen with Star Trek. Conan is only going that way because (a) the studio has lured Schwarzenegger, somehow still an international star, back to the fold and (b) the reboot was a flop.
Some franchises have chosen to ignore certain sequels (the Universal Soldier series did this, apparently) but that's not quite the same thing.