Oh man, a collab with one of the greediest publishers on the planet. Fortunately, that wouldn't be possible. What I think would happen is that they would hire the devs on, get everything they need then not only fire them but have them sign a waiver saying that they couldn't work on any FPS games at all. Afterwards, they would take all the mechanics and maps and sell it all first as a DLC package for MW3, GoldenEye: Reloaded, AND Legends.
Oh, then they would make it a standalone game next year.