I've been in a few of these, and I tend to enjoy the concept, so I'm going to try my hand at running one. I can't promise I'll always be the greatest GM, but I can at least be active. This thread is one part interest check, one part group plotting and world-building, as I do like the idea of letting everyone bring their own subplots and rogues' galleries into the game. So far, I have a pretty loose setting put together, in large part so everyone can add to it without difficulty. Events would take place on Earth, and the heroic characters, at least, would start as part of a Justice League style organization. That way, there's no need to roleplay out the potentially long segment of everyone meeting and deciding to team up, and instead, the characters can generally already know each other. It would also probably allow for any given character to be a bit stronger, as things aren't starting at "street" level with emergent superhumans. The superhumans are already there, and the stage is global. If you want to play a villainous role or antagonist yourself, you'd be free to do whatever nefarious plots you so desire, and see where things go from there. I probably wouldn't start with a large, overarching plot line, though one might form eventually. Things would mostly go from one incident or event to another, and overall, the game would be more sandbox-style than following a story from start to finish. It can be harder to make a good story that way, but I find it's also not bad for this kind of thing, even if, as a player, I sometimes run into trouble with sandbox adventure. But, that's why I'd be providing my own villains and other things to do. As players, you'd have a good bit of leeway to add to the setting entirely, possibly even defining ways in which it works. If you want to be part of an alien race, go for it. You've just created an entire alien civilization, and possibly anything else connected to them. If you want to be some kind of wizard, you get a role in defining how magic works. And so-on. It's a bit open, but it's also a bit interesting, I'd hope. I'd encourage bringing one's own antagonists along, or at least leaving some hooks or other interesting things other people could play off of for making their own characters (be they hero or villain). If you'd be interested in this, please say so. And if you'd like to suggest things for the setting, I'd also be happy to have the discussion.