Then, I suggest in doing episodes, or chapters. Each one having 2-3 hours of duration, so we can focus on small parts, and release them as we finish them, thus even if we are stopped, we were able to provide some of the game.
This way, we can be faster in doing some gameplay events, and etc.
Besides, we could try to make special animations for important events. Maybe, we shall try to use an animation made with pencil and paper, or some stylish work with pictures, so we can provide a good, satisfying view of the story, and it will be easier and won't stop the flow of the game production. 3D cutscenes may be awesome too, just one idea to take in consideration. ^^