Probably not. I still haven't played Black Ops, and I don't want to. I'm glad I only spent $25 on Modern Warfare 2 because I'd have felt ripped off if I'd spent more. I think that says a lot about my opinion of the franchise. As for the future warfare thing: we have tons of games with "future warfare" already. I might be open to the idea of a game that's less science fiction and more speculative fiction, but the idea isn't all that exciting.
Personally, I don't think WW2 is overdone, I think the Western Front of the European Theater of WW2 is overdone. I'm sick of it, like most gamers probably are. I want to see games set entirely on the Eastern Front, the bloodiest part of the bloodiest war ever, which has been relatively neglected because it didn't have squeaky-clean G.I.s draped in Old Glory. I also want to see games set in the Pacific, with their own sort of feel to them, distinct from any WW2 game with Nazis in it... I'd hope for a focus on the tense, primal sort of warfare that took place in theater Fighting in a jungle should not feel like fighting in France with more palm trees.
Going away from WW2 entirely, why not Korea? That was NOT a small or one-sided war. It would be easy to set a game in that conflict!