10 million is too high. It may well turn out to be one of the best JRPGs of recent times, but that doesn't change the fact that JRPG are pretty niche at this point. Too many kiddies aren't interested in anything outside of the usual COD, GTA, FIFA, AC etc. It will do well though, you'd think over its lifespan it could (and should) hit 5 million sales.
PREDICTIONS FOR END OF 2015: (Made Jan 1st 2015)
PS4 - 34M - XB1 - 21m - WII U -12M







