FF versus XIII's release date is December 31, 2009. in both US and Japan..
FFXIII's release date is April 30, 2010. in both US and Japan.
i kno many of you have heard rumors of FFXIII being released in April, but IGN says these are the release dates. i dont know where they got the info, cause i even checked SE's site and its still TBA. and i thought versus wouldve been released after FFXIII..? also.. Japan gets their games about 4-6 months before US right..? i dunno its most likely not true and they just put dates for the hell of it. this is probably i worthless thread lol. but here are the links to where i got the info