I've always wondered why an online Pokemon game never surfaced. If it followed the style of the cartoon, it would be an amazing game. Moving a character around the world, hunting down monsters, using voice commands in battles, huge tournaments you have to fight your way to get into....
Why hasn't this happened yet? Honestly? People talk about a Zelda MMORPG, but that would be franchise milkage and wouldn't hold up as well.
While we're at it, Animal Crossing MMORPG is a must. In fact, make it halfway open source, so people can come on there and mod crap in droves. For example, I have an arcade machine in my house, but I can't play it. I can't play my ping pong table either. But you give nerds the chance to make that stuff themselves and it WILL appear. But make it official - you have to submit it to Nintendo, who then has to approve it, and if it works, then they patch everyone's game. So now everyone can play ping pong. And then people can have ping pong tournaments.
It would become an endless game in every sense of the word. You could have races in different vehicles, Jam with the Band like concerts, marketing and economic systems for selling clothing, and a million other possible additions to the game.
THAT'S what I want. If it can happen with Counter Strike and Day of Defeat and Enemy Territory and every other mod I see people making, then surely AC has an audience for it. Already we have someone hacking it, might as well open the flood gates...