An idea that i had was that there should be a place similar to marketplace that is like a duel/challenge application..

the player who wants to challenge someone in a heads up duel can place it there.

if there is a time and date set to it, people can side bet on an individual player to when they play and get paid out like a donkey bet of sorts..

i think it would be fun...

also betting on pro football would be fun as well

gl on tables