Hear me out, the RPG aspects of mercenaries would make it perfect for a co-op mode! Think about how well the Starcraft co-op mode was received! Two players queue together to take on a level or a boss. Of course Blizzard could work out the kinks later and evolve the mode a bit. I think this would be pretty revolutionary especially since MTG refuses to create their archenemy mode or any others that could be enjoyable and add a certain multiplayer aspect to the game for more casual players.