Personally I would hate to play this game with thousands of other people. For one we would have to pay a monthly fee, which I`m not opposed to in MMO`s but this game lacks the world size and customization that other MMO`s have. I`m going to play this game because it will be a great co-op experience and a fantastic single player game as well. I hate how developers these days are focusing on MMO`s because they know they can make a profit. I will be very disapointed if I ever see a Fable MMO. Also if thousands of other people were playing in Albion I would no longer feel like a hero, the heroes would out number the NPCs and I would loose all sense of being an individual in Albion.
I`ll be happy enough playing with my buddies on co-op.
It`s definitely a long shot, I highly doubt the multiplayer could support thousands of players. I would be happy if it could support more than 2 though...4 or even 16 like GTA IV would be great, but I somehow doubt that will happen as well. I would like to play this game with more than one other person, but I wont complain. It`s rare enough already to find a good multiplayer RPG these days.
Anywho, this is just my opinion. many of you out there might love a Fable with thousands of other players.l I just think it goes against the idea of what a Fable game should be.