I hate all reality TV shows but there is one I'd consider watching.
A real life version of the Japanese movie "Batoru rowaiaru". Put people (not a high school class, like in the movie) that are sentenced to death on the island, and forced to kill each other. Last one standing wins. and the winner doesn't actually win anything at all except he gets to join the next round of contestants and lives longer.
Except no guns. Weapons to include bladed boomerangs, bow & arrow, hatchets, sledgehammer, tools to make traps, etc...
To make it interesting every season, they could up the ante. Like in season 2, they could put a couple of starving man eating tigers on the island. Bonus points go to someone who can tame the tiger, and use it as a weapon.
~R