User blog comment:B214/Volume 23 discussion blog/@comment-49.206.213.205-20170325210039/@comment-10330822-20170325211629

ExE isn't a new series, it is the new group that is going to be formed in the future to deal with issues threatening the peace of the Three Factions. Ajuka and company want Issei to join the group, recruit people, and eventually lead the group himself.

There's a possiblity we won't see it in the series itself, and it will be Issei's "job" when the series is over.