I think it will just that it will take about a decade. The thing is you can't freeze time or it becomes almost as silly as 616 where more and more junk get crammed into the same ten year period (roughly as the characters after aging normally for a while suddenly just stopped). A billion things can't happen in the space of a few months, it just goes beyond the realm of possibility. Plus you keep someone like Spidey stuck at 16 you run out of plot ideas, as there's only so much you can do with a 16 year old character. Same goes with Reed and Sue, people expect development, they can't just be dating forever as that too will get really old. People naturally expect progress in terms of character development and that means the passage of time.