Dude all I know is that there is a 4th person in the void and he's going to appear in the fable series soon enough since he aint mentioned and I have a logical explanation to show that he does exist.
SPOILER:
The reason for Jack of blades wanting the power of the sword of aeons is that he's the rightarm of the King of blades, he isn't mentioned anywhere but he exists (King,Jack,Queen,Knight) prehaps the sword aeons is the only to unlock the portal from the void to the physical world and since jack possessed it he came through, I think Queen of blades is still alive only as a shadow being as seen in the shadow court where u have to make a choice loosing ur youth or not for the sake of a young girl. Basically The shadow courts power was sealed up and is slowly rehealing by the sacrafices of innocent people.
I don't think so but Reaver maybe the carrying the reincarnated soul of The King of blades.
I got so much more to say but I Cba at the moment.