User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-16281343-20141026010620/@comment-1359322-20141029074842

Well even if Issei gets his Evil Pieces now, Issei won't be using it yet. For now Issei would just focus on taking on Khaos Brigade first. Then he'll switch his attention to either becoming a Harem King or making Rias the Champion of Rating Games. After that he might and go form his territory and all before going to form his own team.