If you swing on over to this page and can read japanese, you will see that there are some events scheduled for the Game no Dengeki event in March.

Compile Heart’s event reads

We’re doing it this year too, reporting the latest Neptunia information on the Hyper Dimension stage! There’ll be console gameplay of that title that’s going on sale soon, as well as a Hyper Dimension Talk with the Neptunia team and special guests that fans won’t want to miss. Naturally, there may be a customary surprise, too…? Also on that day, the hand of a demon from the ○ realm reaches for the Neptunia team!?

Gust’s special Atelier event reads

Every year, as promised, we’ll bring information on that which can’t be written here! If you want to know the true latest information on the Atelier series that you might not see on the net, you’ll have to come to Akihabara this year, too!

So there you have it, while they don’t announce anything concrete it certainly seems like we will be hearing some big announcements concerning the Hyperdimension Neptunia and Atelier series especially since we got new game announcements in each series last year (Re Birth 1, Noire, and Atelier Escha & Logy).  We will be sure to keep you posted.