A few thoughts,
If the leak is real I am fine with a 48 character roster, maybe 49 with mewtwo, cause that would mean I was right about predicting roster size.
However, I hope the rumors/speculation about Dixie, Ridley and a few others being in and having no Lucas DLC are not true, because that would not only mean I was wrong about the roster size, but I would not get my Lucas back.
I either wanna be right, or I wanna be happy
I'm glad everyone can finally shut up about Ghirahim.
If the leak is true I am theorizing that Dark Pit, Doctor Mario, and Lucina were all originally intended as elaborate alt costumes, but in the interests of fleshing out the roster Sakurai decided to give them separate slots since they were already designed and easier to add in than giving Wolf and Lucas their spot back since they would have required work from scratch. This would also have meant the roster would have been originally 45 characters, which is very consistent with Sakurai's original comments about balancing issues and having a smaller roster, and more consistent with my original prediction of a 44 character roster.