During the Blank Points part of BBS, when Terra and Xehenort are fighting over control of Terras heart, Terra convinces Xehenort that he will succeed in winning back his heart. Although not totally convinced, Xehenort says that even if he DOES win back his heart he has a "back-up plan" (those aren't the exact words he uses but thats the jist of it). Anyway, could this "back-up" plan be Riku? He is the most likely to succeed to darkness..so that's kind of my thoughts/theory on this.
During the Blank Points part of BBS, when Terra and Xehenort are fighting over control of Terras heart, Terra convinces Xehenort that he will succeed in winning back his heart. Although not totally convinced, Xehenort says that even if he DOES win back his heart he has a "back-up plan" (those aren't the exact words he uses but thats the jist of it). Anyway, could this "back-up" plan be Riku? He is the most likely to succeed to darkness..so that's kind of my thoughts/theory on this.