Capcom have trademarked "Ace Attorney Investigations" in the US, and it's sounding like a release for Gyakuten Kenji outside Japan.
Plans for a Western release of Phoenix Wright/Ace Attorney series spin-off have yet to be announced, leaving fans uncertain whether or not "Turnabout Prosecutor" would ever be translated. The game is different to the regular DS titles, this time following Edgeworth and Gumshoe through crime scenes as the pair piece together evidence to solve cases. With Ace Attorney Investigations in place, it's likely that it'll be used as the Western branding for Gyakuten Kenji given there currently aren't any unlocalised games to fill.
Thanks to Siliconera.