iYeshy, it's fully possible to remove the loading screen.
LowPolyCount, I like your answer on that thread. Removing the loading screen.... Unreal Tournament in their latest title tried to drasticaly lower the load time and suceeded. What they did is that the maps are preloaded in the background. By the time you are ready to get in game, most everything which is needed has been loaded. It takes at most 5 seconds and you are in game.
League could do the same by loading the map while you are choosing champion.