Next Nintendo Direct on June 4, Covers Wii U
Satoru Iwata to host worldwide pre-E3 broadcast.
Nintendo will host the next Nintendo Direct broadcast on June 4 at 7:00JST. This will be a Pre-E3 event and will feature new information about Wii U.
It looks like Nintendo has similar broadcasts (or possibly the same broadcast) planned simultaneously in multiple languages throughout the world. See the schedule here.