doubt it's that high just on one platform
vita and especially steam are gonna bring in a huge boost, i think(i hope)
I don't think so according to the CEO reaction ("could be better, could be worse"), but hopefully after Steam and other versions releases they can do enough to warrent the remake for the sequel.
I certainly think the four other releases are going to boost it sales wise. I wonder though, if the 500,000 is reached does that mean we are going to get Exodus as well as a new game?