Unknown. May not be a problem. I’m just speculating about potential licensing issues, since one of the things that can cause difficulty is the soundtrack, with licensed music like in GTA and such. On the upside, the publisher for JSRF is Sega, and they’ve had a bunch of stuff on 360 made available for back compat on the Xbone, so even if there is a problem (and again, no idea) hopefully they can sort it out.
I mean for that matter, no MechAssault on that list. Seems like a no-brainer, so hopefully we’ll be seeing more show up soon.