Since I was in that game that died, I happen to have a slot in my schedule.
I enjoy games that incorporate an element of mystery and/or enigma in them, so perhaps something that's not based on existing works. In my usual idiom, let me shotgun a few ideas right off the top of my head.
1) Habitats & Hardsuits: Science fiction style M&M. Could be in-system near-future 'hard' sci fi with colonies on the moon and Mars, and plots revolving around terrestrial states and corporations and their squabbling...and the deadly results therof. Could be wilder and woolier soft sci fi space opera. Characters would be human or (in space opera) near-human alien, with powers generally provided by gear. Alternatively, this could be a more cyberpunky setting, with themes including the 'Technological Singularity,' and deal with such transhuman issues as man/machine boundaries, created life and its 'rights,' and the limits of the evolutionary imperative...
2) The Semi-Supers: Everyone pick a power. That's all you get. One. Spend some points on it, then round out, and you have the Semi-Supers. A fairly low-PL 'supers' game that owes conceptual ground to things like the first season of Heroes, the 400, and depending on the PC's and what direction they take, possibly to comics like The Runaways and so on. The idea is not to put a lot of emphasis on super slugfests (though there'll be some), but rather on the human issues that the characters encounter. Whether they go public, or try to stay secret, the decisions they make will lead to ever more complex quandries in the future.
3) Immortals: Supers setting in which there are a very limited pool of people on Earth with powers, among those powers being agelessness. But after centuries of rampaging and reckless use of their power, they discovered they too have limits and were forced into deathlike hibernation. Now they're awakening...weak after their long sleep, but still stronger than mortal men. In ages past they were our gods and demons. What will they decide to be now?
4) M&M Scion: Kind of like 3, only instead of superhumans that once pretended to be gods, we'd be playing the semi-mortal offspring of gods. Sure it seems fun to discover you're heir to the beauty of Venus, the wisdom of Thoth, or the wit of Coyote...untill you realize that your folks have
chores for you to do! There's actually a White Wolf game called Scion that explores this, but I think it'd be a lot of fun under the M&M system too!
5) Magic Academy: Much like the Movie/Book Series That Must Not Be Named, the players play students in an enchanted school for blossoming young mages. Hijinks ensue! Alternative variations include Monster High, were we play supernatural critters learning the ropes.