This actually came from a super hero game was playing a while back. Namely after a few beers, and looking over some comics to realize something. Nearly all the female characters would be perfectly at home in a porn movie. We also noted that the amount of property damage caused by any heroes or villains would probably cause insurance companies to go bankrupt over a very short period of time. So, the idea was this. The world has had a rise to super powered individuals due to some sort of Mcguffin. While the good ones start doing heroic stuff, the ones that abuse their powers start to rise up. Heroes and Villains begin to fight, and property damage begins to rise, insurance companies begin to go under. Eventually, the government starts to contemplate full martial law, until an entirely unrealistic solution presents itself. Corporate sponsership. Heroes, now sponsered by a backer, continue to fight crime. The backer, in turn markets them. But our story is not focused on more legitimate backers. No, it focuses on a team sponsered by a porn studio. Our heroes fuck as their day jobs, leaving the fans not having what lie beneath their skimpy outfits. By night, they fight crime. And thus, the Porn Stars were born. The story would be like a comic book, episodic, often beginning or ending with the character in question banging someone for a movie, before doing their super hero job in their off time.
I like the idea of having the porn job as a "secret" identity. It could be even more fun if the arch villain is also a porn star, but they are unaware of each other's identities.
