Dunno. There's a lot of hype built up around the game, but at the same time it has "XIII" attached to it, which, for a rather large fragment of the FF (former FF?) fanbase, is a stigma now that warrants no sympathy. Look no further than the giant sales number gap between XIII and XIII-2.

I don't see it flopping critically or commercially, but anything is possible when a game stays in development hell for this long, really.