I think if they made it into a nice long movie or mini series it would be best, let us enjoy the characters and move on before the formula becomes redundant. It would also give them more chance to do fun things like the Chess Kings hands floating away when he grabbed the one girl's head without them running out of things to play with in the space.
Maybe I'm wrong and there's a lot more to the space, but I think if they hit a few of the key points and end with a new person showing up and Pomni having to comfort them, thus everything coming full circle, it would be best.