Larian has said there would be a multi-player component in the next gen game, though has not released any details. Unless the movie really gets into the MM part of the MMORPG game Archlord, any multi-player game with some form of server to allow people to meet and form parties, etc could fit into the plot.
Well, since I probably know more about autism here then most others, I feel I should say something:
They didn't even have to use an MMO.
Any good rpg with a deep world/story would suffice.
Though the major reason *why* they would've decided on an MMO is because he would have at least *some* contact with other people.
The general idea of BenX kinda reminded me of .Hack//Sign...