From Suda 51 comes Kaiho Shojo, a touch-controlled mech shooter starring a schoolgirl who is also "president" of Japan, and operates an 11-foot-tall winged mech. This game features animation from the studio Bones, suggesting a high-budget approach to these games (which are close to being considered "minigames").
Yoot Saito, creator of SimTower, Seaman, and Odama, contributes Air Porter, a game about managing luggage at an airport. There's really no overarching theme to these things!
Yasumi Matsuno, the man behind Ogre Battle, Vagrant Story, and Final Fantasy XII, is making a "darkness fantasy" RPG called Crimson Shroud. Matsuno is actually working full-time at Level-5 now. And, weirdest of all, comedian Yoshiyuki Hirai (from the group America Zarigani) is designing a game about running an RPG-style item shop, called Rental Bukiya de Omasse.
These details originate from Famitsu leaks; we'll certainly learn more this weekend at Level-5's event.