My book would literally fit "back to the future with dinosaurs." Wow, I wish I'd thought of that for my comp... lol
My comps are recent, non-mega-bestsellers in my genre. But my hook (what I'm thinking of as an enticing, one-sentence, high level description of my book) uses old, mega-bestselling books (1962 and 1997), which also both happen to have been made into movies. Is that ok?