The rest of it should be a lot easier. Because the theory arises from the films I've been watching, conveying how the theory applies to the films is just the same thing but backwards.
I've been confident before in a piece of work, only to get it back with significant, heavy critique, but this time, I think it really will be good. Or it will be horrible. My committee will let me know either way.
At this point, though, (like so many things in life) it's just a matter of doing.