Considering the sad state of UC Gundam in the US, I doubt it'd come out here. They didn't even bother bringing over OYW games like Giren's Greed, which I'd expect to require less translation work involved due to the repetitive nature of the battles.
Seeing as how they crippled the Encounter in Space PS2 game's online feature for the US release - they can't even be bothered (or too cheap) to set up a server for MS skin downloads and custom pilot rankings, expect Bandai's Gundam MMORPG release in the US to be fee-based like FFXI.