You can't discount the rising popularity of board games as an influence here. Games like Last Night on Earth, Descent and the classic Fortress America all featured a 1 vs everyone concept that is finally starting to be realized in video game form. I hope we will start to see more video games borrow from board games that feature bluffing, hidden information and betrayal as core mechanics. A video game version of the Battlestar Galactica board game has the potential to be incredible.
There are a few games in Nintendo Land that do the 4v1 thing extremely well (my favorite is the Luigi's Mansion one which is like Pac-Man Vs in reverse).