We don't know 100%. They say addone which leads me to believe you have to have the first game MOH:AA to use this one.
But I have learned not to assume anything. I am however 80% sure it's an addon to your original game.
I think it'll me a standalone like Mysteries of the Sith, but you have to verify it with your MOHAA CD. That's how MotS was, you needed the Jedi Knight disc 2 to start the installer.