User blog comment:Lias' Pawn/The Possibility within the new 'Shin' High school Dxd/@comment-1359322-20180407043631/@comment-1359322-20180407053119

He already mention in his twitter Shin DxD will be the end of Ise's story (for his generation that is). And it'll only cover the tournament no plans at the moment for any expansion. I wouldn't really expect 12 volumes either, maybe 5-7.