Wonder Woman is a former superhero turned rogue and an antagonist in the Justice League series.
Much like her main counterpart such as being an Amazon, but it all changed when Lex Luthor became president and executed Flash. Wonder Woman along with Batman and Superman launched an attack on the White House in response to Flash's death. She fought the Secret Service alongside Batman while Superman confronted Lex Luthor in the Oval Office and murdered him. Diana came into the office and was shocked at Superman's decision to murder Lex.
The Justice Lords took over Earth and brought peace to the world. Wonder Woman traded her old costume with a new one. And she cut her long dark hair, to a short buzz-cut.