I think that's more a case of a franchise spliting off into two separate continuities rather than backtracking
Which could maybe still be the case with Star Trek. Maybe the movies will continue with the alternate universe, and maybe a series would be in the prime universe. It probably wouldn't happen that way if the Bad Robot team controls the TV series though. I think it's too hard to say since a TV series doesn't even seem likely for the next few years. There's a lot of variables.
Perhaps, but I don't really see the upside to going back to the old continuity at some later date, especially as time goes by and the previous cycle of Trek shows fades into the misty recesses of memory, at least as far as the general public is concerned.
Better to stick to the modern continuity or start over again . . . .