Your guess is as good as mine.
Due to be released in Japan on March 1st 2012 on both Blu-Ray and DVD is a special live show celebrating 15 years of the Sakura Wars series. The show which contains thirty one songs/performances across the history of the franchise and also includes three brand new numbers.
There’s also a special bonus feature showing behind-the-scenes footage, rehearsals and the cast interacting backstage. If you are a big fan of Sakura Wars/Sakura Taisen this should definitely be on your wish list for the new year.
That and a damn straitjacket.