User blog comment:Xhatefate/DxD Updates~/@comment-1359322-20150721013918

https://twitter.com/ishibumi_ddd/status/623153554841153536

Not really anything special just a reconfirmation by Ishibumi that after the fourth arc is over, we'll return to the original four heroines (Rias, Asia, Akeno & Koneko) as well as the late heroines (Kuroka, Le Fay and Kunou).