I actually don't really care about OG games now. Would love for the 360 list to expand.
I mean publishers with commitment on the platform (EA, Ubisoft) have a lot of stuff out there still. Stuff like the last two Medal of Honor games seem like no brainers to me, shocked we're still waiting on these.
Publishers probably don't want to rush getting all their games BC since that'd completely destroy the demand for their titles, while also limiting how much each of their titles would sell if they brought them back in large lumps (one title of theirs released periodically might sell better than releasing a few of theirs together at the same time, since it's more focused less titles).
Not to mention the fact there are a lot of other big titles coming. Hell, we're suppose to be getting the Halo games soon (that's 4 games in the works). Then also add the fact we don't have Crackdown 1&2, Fable Anniversary, VP: PA, etc.
Their BC release priority isn't so apparent, but I think it's safe to assume a lot of the games we're waiting on are in the works.