There are lot of posts in this thread and I don't have time to read them all, so forgive me if this is already debated here but...
This movie really did nothing to explain where Wonder Woman was since WW1. Toward the end of the movie they had a great opportunity to address that with the whole 'they don't deserve my help' bit. And then we learn Aries is real, and has been behind some bad shit, and WW fights him and kills him and... just gives up on the world after that? Allows the rise of Hitler and the holocaust? And waits until a giant monster attacks Gotham to make her return?
I think this movie completely failed as a prequel because of this.