info from GT:
.The game was supposed to be a trilogy(this I doubt, considering how HS1 ended)
.Ninja theory moved away from the franchise, but SONY owns the ip, so they can do whatever they want with the franchise
.The game apparently sold over 1.5 million copies(assume they are quoting this site)
.The story has already been written
.Sony has a team on HS2 already working on the title/may support the entire franchise(I assume it's santa monica O= )
and... the game may debut this E3
This information all came from GT, which quoted HHG, which has been in talks with sony for a long time to do exclusive features for promo,
so it could be true
http://forums.gametrailers.com/thread/heavenly--sword--2--informatio/1199428