This is how I see it:
*Minnie looks up, sees death star I*
Minnie: Awww [parasitic bomb]. Chip. Dale. Call Sora. IMMEDIATELY!
And then we start the game at disney castle ([tornado fang]ing FINALLY!) with the death star I hovering above Mickey's homeworld. Later THEN starts Episode VI, when Sora finds R2-D2 and teams with Luke. Proceed to the unwinnable Tusken Raider bossfight.
The bright side? More options for party members akin to Lunar: You got three on the feild, and three other members in the reserve (since you got Han, Chewie, Leia and the droids). This was my gripe for the previous installments as whenever I entered Agrabah or somewhere, one of my party members is forcibly replaced temporarily for the plot. Otherwise it's up to the gamedev for KHIII.