His speed I think will play a large part of if I actually care if he's in. I just hope online isn't a billion people playing Cloud all the time.
That's why if cloud is in, they will try match him up with a couple amazing characters so the online isn't only cloud. Could cloud's reveal hint to sora, snake, dart, etc? (you get the point)
for me the characters i want in the game most are kazuma, sora, dart or etna (or morrigan can replace etna), if any of those are in im set and happy xD