So Raos and the heartless, an army of heartless, and all the bad guys from both games attack TCTNW randomly. The unsuspected attack deals many casualties, only 4-6 survive, and then the group starts killing everyone in TWTNW. The nobody survivors go to TT, run into Larxene and Ribegal. Someone leaves and gets the Midgar team, Gullwings, old keyblade weilders which now includes Namine, and they barely kick a** in an epic final battle against the heartless.
Just an idea
Organization Reformation
Nobodies have all been wiped out, save for a lone few. One takes it upon herself to reform the Organization, and revive their hearts.
