I personally found the movie a bit corny, but that's just my opinion. You should just watch it yourself, but then again... 3 hours is a hefty portion of your day
You could probably use it, but if I were to use a film I'd look for something more left field/arthouse. I don't think the markers look too kindly upon the commercial films as related texts, but then again I guess it's not your average blockbuster (maybe i'm delusional, is it even a blockbuster at all? XD) .. but yes, it could work.
It depends on how well you are able to write about it, and how sophisticated the concepts are.