From a interview with Judd Winick:
While the JLI are in the book with issue #12, has the cancellation of "Justice League International" affected the story you're telling at all? Or is what you're doing unaffected as it is specific to your book?
The script was written before the announcement. Even though the book is being canceled, I don't think the JLI is being disbanded so much as we're not publishing a book about it. I can't tell you how it's being wrapped up, y'all will just have to read the JLI title. In Batwing, we will leap in as a team, and Batwing as a member.