I think it's because she's being featured in this month's issue. I wonder if they'd have done the shoot by now since there's a bit of an 'introduction' in last month's issue.
We only know it's a "SPECIAL SHOOT".
http://vivi.tv/magazine/new/yokoku/
撮影 (satsuei) is what she used to mention the shoot and that refers to photos or video... we'll see when the issue comes out, I guess. Or if she tweets some sneak peeks.