it will probably never happen but they should make a 'final episode'....
.... like showing the characters living in the mall ten years on from the end of season 5 or whatever.
obviously we are never going to get another series with the original cast but i dont think it would be impossible to get quite a few of the original cast back for like a special final episode type thing (they should make it like an hour long or something).
like i said, i doubt it would happen, but it would be cool.