Sumo Digital?
They did Sonic All-Stars Racing and Transformed. The Vita launch title they did was Virtua Tennis if I remember properly. They also managed to get Outrun 2 running near perfectly on the original Xbox and later 2006: Coast 2 Coast on PS2 and PSP (PSP port was an incredible achievement for the time).
They've done a fair lot really, they did a lot of the handheld ports of racing games some not so good as others (includes TOCA Race Driver, Sega Rally, DiRT 2 etc.)
I think their main credential really is getting very good representations of games made for much more powerful hardware running pretty much the same.
There are few studios which more experience and qualifications for the job really. 360 owners should be getting a solid release.