***Update***
Nintendo has just confirmed the U.S. presentation for Wednesday, Jan. 23, at 6am PT/9am ET. Similarly, it will be focused on the Wii U.
***Original***
A new European Nintendo Direct session, set to take place tomorrow, will address new Wii U games. The presentation, which takes place January 23 at 3pm CET, will be hosted by Nintendo President Satoru Iwata as he "reveals new games for the Wii U".
The official site says it will feature "upcoming Wii U titles." Last week, Nintendo revealed its schedule of upcoming games for the Wii U which includes The Walking Dead: Survival Instinct (March 26), Need for Speed Most Wanted (March 19), and Rayman Legends (February 26), among others. It's unclear if tomorrow's presentation will address these already announced titles, or brand new, unannounced games.
Either way, this presentation should give us a good feel for where the Wii U stands in terms of its game library. What I considered to be a strong launch lineup quickly turned into a post-launch lull. As of early January, the Wii U was selling at a lesser pace than the original Wii, but was more profitable due to its higher cost.