Here, Amazing Race, you can have this one for free (or hire me, I'm full of great ideas). You know how you always have teams of two (well, except that one family season)? Day one, everyone shows up on the start line, when suddenly, plot twist, you jumble the teams. Now, instead of the person you thought you'd be racing with, you're racing with a complete stranger, and competing against your friend/loved one. Everyone will hate everyone else, and it would be extremely entertaining to watch.