So, I admit that I've been out of the Magic: The Gathering loop for a while now, largely due to a focus on other hobbies (Warhammer 40k, D&D) and a desire not to learn all of the new 'Stupid Human Tricks,' as one friend of mine terms them, associated with the 2M10 rules changes.
However, as I looked through Gatherer recently for cards by a certain comic book artist, I stumbled upon 'Schemes.' Intrigued by cards that provided titanically powerful effects at no apparent cost, I found this article on the subject.
So, apparently, Magic: The Gathering has adopted 2+ vs 1 as a valid playstyle, giving the 'Villain' access to powerful 'Schemes' to counteract the extra resources the other side has. That's cool, actually - I've heard that the WoW TCG did a number of interesting things with "Raid Boss" decks, designed to be played against multiple opponents (hopefully not 25, though - think how long that game would take!)
I wonder how these might figure into a sort of cooperative Elder Dragon Highlander. It seems like that would probably take care of the game-length problem. Probably.
Plus 'Schemes' are an excuse to say 'Exactly According to Keikaku*' when they come to fruition.
*(Keikaku means plan)