Here we go again. Speaking with Gamezone in a recent interview Miswalker's Takuya Matsumoto discussed The Last Story developer's future projects, which might include the possibility of more action-RPGs for Nintendo's next home console.
In addition to publishing The Last Story, Nintendo and Mistwalker have worked together in the past, joining forces to release Japan-only SRPG ASH: Archaic Sealed Heat for the DS back in 2007. Perhaps they could work together again. At their E3 2012 Analyst Q & A Session Nintendo President Satoru Iwata said there was a "high possibility that Nintendo will be a partner with [third parties] in an unprecedented manner" with companies that could find unique uses for the Wii U Game Pad.
Such collaborations are already in the works, including Platinum Games' Project P-100. Maybe Nintendo would be willing to work with Mistwalker again if they came up with an interesting gimmick. I suppose the bigger question is -- would we want them to? Considering Nintendo of America's reluctance to bring past collaborations stateside, I wonder if it'd work out better if they partnered with Marvelous AQL, Aksys or Atlus from the get-go.
Mistwalker would like to develop Wii U action-RPGS [Siliconera]