5 Minute warm-up/wait time to prevent DC's and 4v5s! [Essentially the greatest idea I have seen]
Use URF to prevent 4v5s! (Read more inside) * /r/leagueoflegends
This would be a great way to stop people from playing games with a dc and to help un-winnable games. The idea of having URF as a 5 minute pre-requisite to playing a game would be great. Basically this idea switches out the loading screen for this. If everyone loads properly, after the 5 minutes you can play without having to worry about a DC. If they don't connect, the game doesn't start.