If the local troops idea is implemented, maybe some kind of a Mumbai-all-over-again-deluxe mission could happen in one of the larger urban environments (probably set in a national capital, or at least some otehr established city). A larger-than-normal alien force is massacring citizens and such at the centre; the local forces are trying to pin them down, but the mission would be balanced so as to make the local resistance futile if not assisted. I think such more large scale missions would make a lot sense later into the game. Oh, and ofcourse the fallout from a failure here would be immense.