For Tekken Tag Tournament 2 Wii U Edition, a Japanese peripheral maker is releasing a Tekken Tag 2 fight stick. It connects via the Wii Remote, and it will be out on December 8 when the Wii U launches in Japan. Priced at ¥7980 ($96).
Back when Kotaku saw Tekken Tag 2 at the Tokyo Game Show, Tekken producer Katsuhiro Harada pretty much confirmed that there would be a third-party fight stick. This, it seems, is what he was alluding to.
HORIからWii U初のアーケードスティック製品が登場 [4Gamer]