According to the latest issue of Japanese Nintendo Dream magazine, Nintendo EAD's Takashi Tezuka will be producing the Nintendo DS Yoshi's Touch & Go (Balloon Fight DS).
Tezuka has been involved in the production of the majority of high-profile Nintendo EAD GameCube titles this generation including Animal Crossing, Luigi's Mansion, and Super Mario Sunshine. For you inquiring minds, more info can be found on Tezuka's profile.