If there are I can see how X3 would end with Phoenix sacrificing hrself and it would be her, scott, and Prof. X not dead but in the astral-plane and they would fight the Shadow King. This would be a great sequel of them finding their way back to the real world and by the time of X5, we would see the whole team together. I could just see the title!!! X4-X-Men in Limbo!!!!!