Namco Bandai is serious about this whole Hybrid Disc thing. Coinciding with today's announcement of Hybrid Discs based off Eureka Seven and Lagrange, the publisher opened a brand site for the series.
The site has links to official sites for all the various hybrid releases, new and old. The collection includes Tekken Hybrid, .hack//Sekai no Mukou ni + Versus, Rinne no Lagrange: Kamogawa Days, Eureka Seven AO, and three Macross games. Previous entries used the term "Hybrid Pack" rather than "Hybrid Disc."
Regarding the two new entries, Eureka Seven and Lagrange, Namco Bandai has not yet shared details or screens for the game component.