Apparently, today the German USK ratings board leaked that Phoenix Wright would be coming out on the Wii.  There is nothing else known at this time, but the early speculation is that it would be a WiiWare title.  If it were to just be a port, the game was released on PC in Japan, so that is probably what would be used.

Either way, it would be more Phoenix Wright in some form, and that's a good thing.