First of all. NISA had presentations about Mugen Souls, the Witch game, and Legasista (Legasista was even playable and I think the Witch game was too). I saw these pics. They talked about A LOT more than is in that first post. Wherever they got that info, it's horribly incomplete.
...Which is assuming they have absolutely nothing planned for the future, and again suggesting they went through negotiations, and both parties signed some kind of agreement, in order for absolutely nothing to ever happen on either end.
It hasn't gone anywhere yet. I still think they must have had something pretty concrete planned, or they wouldn't have bothered. NISA didn't need to sign a partnership contract just to bring over one or two games... I think... so, yeah.