Upcoming Diablo 3 Patch to Allow Duelling
As announced by Blizzard last December, Diablo 3 is about to have a duelling system implemented, finally answering all-important questions of whose character is the strongest, whose class is the most overpowered, and whose cheap spell is the best to spam. As quoted from Blizzard, they have avoided the duelling prevalent in Diablo 2, citing that they did not wish to have "the potential for griefing as it existed in Diablo 2", but rather provides a safe area that they would be transported to upon talking to an NPC. Up to four player battles would be supported, and death would not be permanent under any circumstances. You can check out the rest of the patch here, where other changes such as class balancing and new recipes/items would also be detailed.