The website announced something about a campaign to promote the first DVD / BD of the series on April 16 (not the release date of the DVD, I think?).... Also, I think that said date is also the volume 7 release date? Or at least close? Anyway, those who attend are going to get rewarded (and read,
rewarded) with a poster of this image.
It's a sample image so we haven't seen it on it's actual resolution....
And, even if I get banned for posting that, it's fine.
Oh, and for those that haven't checked it, here are the images from the official website's
gallery section.