The blog Sinobi seems to have found some retail listings for two new Nintendo games due in the first quarter of 2010 in Japan. Last Window: Mayonaka no Yakusoku (Last Window: Midnight Promise) is a sequel to CING's DS adventure game, Hotel Dusk, set in Los Angeles in the 1980s. It will apparently be out in Japan on January 14!
Zangeki no Reginleiv is the Wii action game revealed in October 2008 as "Dynamic Zan" and not heard from again until just now. It's being developed by Earth Defense Force creator Sandlot, and will include online combat for up to four players when it's released on February 11.
All of these details are unverified, but the fact that Sinobi had the images above for both games (which may come from a retailer catalog) add some credence to the rumor.