White Knight mode is especially promising as an idea that could help League of Legends in general. Players may queue up as white knights and if another player in an existing match is disconnected or quits, those in the queue are asked whether they want to join that existing match. There's no penalty in doing so, and you'll earn as you would normally.
Note: Be a Legend and help some unlucky folks who had a player disconnect. Sure when you join the game you may be 0-20 but that's what its all about.