User blog comment:Manuel de la Fuente/Hajime Isayama talks about the ending of Attack on Titan (June 2016 interview)/@comment-28954877-20160626193142/@comment-8458738-20160703165907

That does seem to make sense unless he plans to end it in September 2018, which was the debut month for Attack on Titan and Bessatsu Shonen Magizine in general since they all started on September 9, 2009.