I have not seen any official information showing it'd be on PC; at this time the stuff I've seen officially stated indicates PS3, Wii, and 360. This makes sense with previous releases from Smackdown Vs Raw 2011 on back to 2004 and earlier, as none of them were on PC either.
That said it's entirely possible it could be on PC, and it'd be a welcome change for the series. I just don't count on it when the formula of "console only" has been used for the series for the last 7+ years