Army of Two is a 2008 co-op third-person shooter that allowed one player to control one of the mercenaries, while the other player controlled the second. A sequel followed—Army of Two: The 40th Day—in 2010, and it was more of the same. The next game could be different.
The unannounced third entry in the series, according to one insider, won't take Army of Two one step further, but two.
EA is apparently working on a new Army of Two called Army of Four,a source told Kotaku. The game will supposedly feature four-player co-op and is currently being developed on the Frostbite 2 game engine.
The game is being developed by EA's Montreal studio and, the insider added, development is not going well. Now that EA DICE's Battlefield 3 is out the door, our source assumes that EA would move some DICE team members over to work on the title, help EA Montreal out.
As mentioned above, Army of Four has not yet been officially announced. Kotaku is following up with EA and will update this post should the company comment.