>>92369496gennedy wrote the guardian episode assuming that he'd never be able to finish the series, so he gave it a vision where jack wins to give at least some closure. when the series got picked back up, he realised he wrote himself into a hole; the vision of king jack the time portal showed would have to come true, because causality/time shenanigans. Gennedy doesn't want jack to go back to the past, that's why he said "all the time portals are gone", and why the voice actor for jack said that the ending is one fans "didn't know they wanted". Instead of going back to the past, jack's going to stay in the future and continue to right wrongs or whatever. The guardian's dead for good, and the king jack vision is either going to be swept under the rug as hard as possible or retconned into being about jack staying in the future.
This has all been pretty obvious and I don't know why people think otherwise.