Couple possible mode ideas.

These are just some basic ideas, if you feel you would like more details, feel free to develop some. Someone has probably already suggested these anyway. :)

1. 3+ teams, 1 map. Pretty self explanatory.

2. Each player selects 5 champs prior to game; each champ is played in sequence, 1 life per champ, experience and money (total money earned prior to item purchases: all items refunded at full value + unspent money) gained from last champ is transferred to new champ. Last man standing, or team with last player, wins the game.

What do you all think?