How will Lexx end?

Although I have not seen series 4 (read some of sadgeezers reviews) the ending will definately have to be related to a spin off and that depends upon who the spin off is about. I think that it may be about Stan or Kai because of stans past (tortured by Feppo and Smoor and other bizare things) and Kai because of the whole Brunnen-g, assasin, phrophecy thing