I'm not talking about coop play during a regular game. I'm talking about having a server program that anyone or Larian can run that has a randomly generated arena or world where players can log on with their characters and explore/fight with/against other living players. They already have Battlefields, all they need to do is expand on that idea, by hosting the Battefield on a server and allowing players to connect to it and share the same environment. I think something like this would greatly add to replayibility and the value of the game in general.
Only thing I see wrong with the idea is that it's pretty easy to hack your characters, so the'll have to have some defined rules and limits on char and item stats (which they should already) and disallow anyone to log in with characters and/or items that passes these limits.
This could also be a playing field for them to develope a Divinity Online mmog.
