Apparently there was another planned season for Vandread, artwork for it exists. But there hasn't been news of it since. Allegedly this is from Newtype magazine which was published years ago, those girls in the pics are daughters of hibiki.
Some info from the net take with a grain of salt;
Girl on the Left: ヒビキxメイア (Hibiki x Meia) Girl on the Right: ヒビキｘディータ (Hibiki x Ditta)
Just some interesting info I though I'd share if it wasn't already news.5/5/2010 . Edited 5/5/2010 #1
Yeah, this information is pretty old.
You can find most of the details about what was meant to be here:
|Forum Moderators: Nasuren|
|Membership Length: 2+ years 1 year 6+ months 1 month 2+ weeks new member|