EA is not shy about using Frostbite for everything they can. Guess they grew tired of paying for Unreal licenses. IIRC Square Enix is apparently working on an internally developed engine and Capcom has MT Framework. Zenimax also has Id Tech 5. Seems were are in the middle of a trend of big publishers cultivating technical expertise internally and leveraging that across as many projects as possible. That may prove to be a greater threat to Unreal Tech over the long run than a competitor like CryEngine.
ModEdit:
Spun off from Medal of Honour thread
ModEdit:
Spun off from Medal of Honour thread