I just read on the kickstarter that Sir Caribus still existed, and that warms my heart. The Lore of the Underworld is still intact. It is my belief that "we" all, the Avatars, Britannia and the Stygian Abyss sort of "Ascended" after Ultima 9, and now it's New Britannia and the Stygian Abyss is still right here. The Universe, if I understand correctly, was torn apart and put back together again - changed.
Now there was one thing in the kickstarter Text that I do not quite understand. We walk through a rune gate to end up here, in the Underworld, and it sort of becomes our new home. That brings up the question why were are happily going to that prison again. Again, because ... we've already been here, and traversed it in it's entirety before - but that is not reflected upon in the kickstarter text. This is going to be the second time we're here. Everything changed, by it's still THE Abyss, and THAT Sir Caribus, right?

Nah, I'm not looking for spoilers, but I sure want to find out why we go through the rune gate in the first place. Do we hear Lord British calling us again? And what of the barons daughter we once rescued? Is there someone who is, again, luring us into this trap without us knowing where the gate will bring us? Will Tybal or his brother make a postmortem appearance? Or the Slasher of Veils? Questions, questions, questions.