According to Marvelous AQL, Shinovi Versus will be the start of a new series, rather than a sequel to the original (above image). The game is currently scheduled for release on February 28th, 2013 and will be priced at ¥ 6980 (US$89). No information on a download version yet. Other than the title, price and release date, no further information has of yet been released, but we can be pretty sure that there will be plenty of images of young busty ninja girls popping up in no time.
With two popular (among a somewhat specific audience) games and an upcoming anime, it looks like Marvelous AQL's well developed girls are still going hot.