User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-26952857-20180419020450/@comment-1359322-20180420010434

Ishibumi already mention Shin will cover the 2nd half of the final arc, in short the tournament only. He hasn't got any plan to move DxD or rather Ise's story beyond that. So High School DxD will end Ise's story.