Wonder Woman: Earth One is a new origin for Wonder Woman best received by mature readers. It pays much homage to past representations of the character of Princess Diana if Themyscria and her legend while also largely updating the figure for today by focusing on the need for the Amazons to concern themselves with Man's World once more. However, there are some issues to be aware of.
First up, purists might take offense that Steve Trevor is now an African American soldier sent specifically in search of Paradise Island by the U. S. military. In Morrison's defense, he is still a good character, and the changes are not much of big deal in an era of race-free casting. Plus, Morrison makes his background a central part of his willingness to help Diana.
Second, and most disturbing, the book relishes in images of violence and (especially) bondage. Morrison seems to include these aspects to link back to Marston's original concepts for the character, but they are very unsettling and push the book into more adult territory.
Finally, the book also rewrites the myth of Diana's creation, a now frequent occurrence, and (spoiler warning) makes her a mythological test tube baby formed from combining one of Hippolyta's egg with sperm taken from Hercules, the Amazon's oppressor millennia ago.
Further information on the book at http://www.dccomics.com/graphic-novels/wonder-woman-earth-one-2016/wonder-woman-earth-one-vol-1.
