Honestly, great pitches from you both. Personally, I think option 2 is the best sort of spiritual successor to allow for rough translations of characters, If we wanted to sort of continue in the same vein. I mean, the idea of it being a "rehabilitation center" leaves room for there to be more going on with the facility or program itself that lends itself to be perhaps more nefarious than it seems. And might just be a more interesting spin. The program could be opened up, like people suggested, in such a way that the characters are supervised and allowed to use their powers in service to their community.

Also, Pitch #4 looks really cool. It's clear a lot of work went into that pitch, and it looks like a cool dark fantasy. Though I realize that might be a tougher sell and doesn't allow us to continue with the characters we made... or even in the same genre.