oh... I just had a lightbulb thanks to some of my looking around.
how to link the stories...
Race for the crown:
maybe the Great King has finally passed on, this is the big king who's in the background of every fairy tale. The guy who must've had poor taste in women (to explain all the evil queens) and couldn't keep it in his pants, and this has a bunch of princesses and princes.
with his death, the crown is up for grabs, because he couldn't keep it in his pants there are a LOT of successors, and nearly everyone who wants a shot to the throne can whip up a claim.
Now the battle of succession begins... and with the lords fighting for the crown it's gonna be nasty.
I think that might be a workable idea.... i got more but I must go