Here's a crazy thought, what if some of those as of yet unlockables were just straight ports of some of Sega's recent Sega Ages line. The ones they made after splitting from D3, the
arcade perfect/revamped PS2 versions of Panzer Dragoon, Dynamite Deka/Die Hard Arcade, Dragon Force, Virtual On, Fighting Vipers, Galaxy Force, Space Harrier, After Burner, etc.
There's buttloads of already-done console ports and remakes that Sega has that haven't yet seen the West. Is it crazy to think they may utilize some of their nifty back catalog, as long as their already ROM-dumping with this package?
Boy, I sure hope so.