During his interview with Dengeki PlayStation, Kamiya stated:

When referring to a “true sequel” to Okami, Kamiya is likely referring to the second game in the series, Okamiden, which was a DS title developed by Capcom without his or Clover Studios’ involvement. The Devil May Cry series has also gone without his involvement since the original on the PlayStation 2, and has been lying dormant for some time now.

Both Okami and Viewtiful Joe are franchises that received critical acclaim upon release, with both still discussed quite favorably today. 

Nothing is set in stone yet, as this statement was merely an open invitation to Capcom rather than an official statement of any of these new games being green-lit. Stay tuned to GameSkinny for further news on this topic as it develops!