My wife unearthed this article which gives counter points to many of the points in Forks Over Knives. I haven't finished it (or even come close to finishing it), but from what I've read so far, replacing your old meat intake with fish is a good idea. And also replacing breads with rice/potatoes is good. Sounds like the movie overgeneralized all animal proteins promoting disease, whereas fish actually helps prevent a lot of disease.
“Forks Over Knives”: Is the Science Legit? (A Review and Critique) « Raw Food SOS: Troubleshooting on the Raw Food Diet