Not sure if this is the best place to put this, but I couldn't find a more suitable thread title.
I'd like you to do a Robotech RPG. If you can't get the license or whatever it would take, that's fine; just shamelessly rip off the main plot concept and giant mecha combat. Not sure how feasible it'd be, since I have no idea how difficult it is to flirt with copyright infringement, but the Robotech series is such profoundly fertile ground, and has never (to my knowledge) been made into an RPG (not counting pen and paper here). Battletech (the American adaptation) has also never been made into a true RPG (only combat sims), which I think is a terrible shame.
Anyway, a story "loosely" based on Robotech would be an instant trilogy (at least) in terms of plot longevity, and has all the necessary elements that you're familiar with in your RPGs, plus the fun of, well, giant anthropomorphic robots. Win-win scenario.