DotA 2 was announced recently I think today or yesterday. Game informer did a big article on it. heres the link to that.
Anyways I play HoN even though from what I hear LoL is better. HoN is really trashy it's retail game but doesn't have working matching making system.
Anyways check the pictures on it and all the other stuff. Looks promising if you like this type of game.