Same thing they did last year on the PlayStation Blog, only this time on their Facebook page.
The 2015 titles already shown are Brandish (PSP), Corpse Party (PC), Story of Seasons (3DS) and Trails in the Sky SC (PC/PSP).
Two of the silhouettes have already been guessed - #1 is Forbidden Magna (3DS) and #4 is Ys: Ark of Napishtim (PC/PS2/PSP - most likely PC version coming over).
UPDATE: And a third one seems to have been guessed, Oneechanbara Z for the PS3:
UPDATE #2: Fourth game appears to be Corpse Party: Blood Drive (PSV), as the domain suggested:
It seems there's only one left to guess, according to one of the XSEED guys:
https://twitter.com/Hatsuu/statuses/554011150958862336
Madam 軌跡I'll be kind to those looking for 8 games in that teaser: there are only 4. Please don't tear your hair out of your head looking for 8.
