Sony is promising information on unannounced PlayStation Vita titles during a web broadcast that it will hold on March 9. The broadcast is titled "Welcome! PlayStation Vita Game Heaven."
According to Sony's announcement, the broadcast will include information about unannounced Vita titles, upcoming releases, and Vita services, as well as new information about in-release titles. The broadcast will feature presentations from game creators themselves.
A.K.A. Sony's answer to Nintendo Direct.