Affiliate Marketing Secrets

I’m thinking about creating a movie database site similar to IMDb. However, I need to know if I need to gain permissions from movie studios to use the movie synopsis/description, cover/poster image, etc. of the movies on the site? Or, would that be covered by the fair use law? Will I need to right my own movie descriptions of each film?
Also, I would like to be able to make money for promoting the movies at some point (if I can right off the cuff, then great). You know, by signing up with Amazon and Netflix affiliate programs. So, what’s the best way to do all of this without getting sued (since everything in the world seems to be copyrighted material)?
Thanks.