
While it's true that future Ace Attorney games will probably be on handhelds, the series has already been ported to PC, proving that someone within Capcom -- and not necessarily anyone involved with actually making the Ace Attorney games -- has no issue with porting the existing titles, which is extremely likely to be what is happening here. And this is the same Capcom that said that Resident Evil 4 would be a GameCube exclusive.
Our guess would be an episodic WiiWare presentation of the first Phoenix Wright. Or a mistake in the rating description.

