As for their future plans with this, I don't think it'll come back. It's already been years since the last game and making a new set of HD models would be too much for SNK to compete with the like of SF and TK. And if they wait to the next generation it'd only be worse. They'd end up doing the same thing they did with KOFXII and have a weak roster with butchered movesets. Their best bet maybe the 3DS or the Vita if that's possible.
I agree that they're probably not planning to bring the series back, but I'd disagree on one point. Making an HD Maximum Impact wouldn't be nearly as much work as making XII was. The animations themselves could be ported over as-is (even if they're a bit stiff), and simply given new skins. In fact, they're already creating new 3D models for use in animating XII/XIII's sprites. So, yeah, they could just make some HD character models and copy/paste the animations.
But yes, it would still cost money. And yes, they've probably buried the series.
I loved the MI series, and it's goofy/awesome combos and goofy/awesome bonuses. I agree its dial-a-combos were a bit much, and would have loved to see it evolve into a RB-ish system.