During a session of “Ask Capcom” for Capcom-Unity.com, a triplet of Capcom employees were asked if Ace Attorney Investigations 2 would be coming to the US. Shockingly, the answer was no.
You can see the news yourself unfold here (skip to 29:40).
The launch of the 3DS (AAI2 is a DS game), and the upcoming focus on Professor Layton VS Phoenix Wright for that system may be to blame.
The original Ace Attorney blew up with popularity in the west after it was ported to DS and given a small release over here.
Ace Attorney Investigations 2, known as Gyakuten Kenji 2 in Japan, is a sequel to Ace Attorney Investigations, itself a spin-off of the Ace Attorney games, usually featuring Phoenix Write.