In 2018, she decided to resign, along with several others, out of frustration with the U.N. sanctions put on the organization by Secretary-General Lex Luthor. She now operates on a new, covert team commanded by her colleague, Batman. The team has since disbanded and she rejoined Justice League.
She attended an emergency League meeting in which Batman proposed to dissolve the team, as a result of the restrictions placed by the United Nations on their actions. After he tendered his resignation, Katana was among the ones who promptly followed suit, presumably having planned it in advance.