That's the intention. I don't know if once they have evreybody there will be some kind of concert or something, but Shion(the president of Cure Media USA)says that he is going to TRY to get them to record at least one song.
Versailles has a Twitter account, and if you don't believe me, check out their official site. Here's the link to their account:
http://twitter.com/Versailles_P_Q
OK, so there are finally more details about the limited edition of JUBILEE; the video on the DVD, besides ASCENDEAD MASTER, is Serenade, there's the making of, the deluxe booklet contains 32 pages, and the limited first press edition that CDJapan is selling comes with a poster. Also, Versailles has left a comment at CDJapan(scroll down to see it):
Jubilee Versailles [CD]
Versailles will be performing at 30th Anniversary Rokumei-kan ～LEGEND OF ROCK MAY KAN～ at the JCB Hall on 3/19. Other bands performing are Mucc, Merry, and Phantasmagoria. Doors open at 17:30(5:30 pm), the event starts at 18:30. Tickets cost 6000 and will be on sale starting on 2/13.
They have a Visunavi page:
Versailles特設宮殿 - INDIVISUAL.asia (if you click on the Versailles banner at the top of the Visunavi page, you will be led to this link)