What needs to be on a Magazine cover?

Conventionally on magazine covers there are many components that are necessary to portray to the public what they are. I am going to look at Magazine covers and what are needed on them to make them a conventional Magazine cover, so underneath i have annotated a picture of the leading film magaize company in the world's front cover from August 2008:

























So now when creating our magazine cover publicising our film we know what we need to include on the cover.