These teens are the original characters and they have to go back to their time in order to prevent some weird paradox.
how much time (real time, our time) do you think they have left before they go back?? how much do you want them to stay?
3 to 4 years for me
i feel there are some things that have to be resolved before they left, like both jeans interacting or the stupid jean/jimmy/tyke/bloodstorm love drama but aside from that i don't see were their story could go.