Set up two people on a blind date, but each playa has a secret goal that they need to obtain from the other playa. Let's call them playa A and Playa B.
Each goal is different, and neither playa knows what the other's goal is.
If neither one gets the goal, they get nothing. If they both get the goal, they get nothing. Only if one playa gets the goal and the other doesn't does that playa win.
I just think this has the potential to be a lot more entertaining than pretty much any other reality show out there.