Videogamer reports that according to correspondence from Capcom PR, the final version of Okami for Wii will sport a fully functional 16x9 mode and not the bordered version seen in the early screen shots.
"I know you guys are lovin' the Okami Wii goodness right now. It's about to get even better because we've got a fresh build coming your way next week," Capcom told IGN. "You might have noticed the aspect ratio was a little off. We did too, and the build you're receiving will display in full 16:9 (no black bars on the sides). Now you'll get to experience the game the way it was intended to be seen."
Sadly there's still no confirmation that the canvas filter seen in the PS2 game will be implemented in the Wii version.