User blog comment:B214/Question and Answers 3/@comment-4547267-20140704034441/@comment-1359322-20140704034716

That would be impossible, if Issei doesn't have any Dragon power, then it means that Issei doesn't have the Boosted Gear, if Issei doesn't have the Boosted Gear, Raynare wouldn't have killed him, Rias wouldn't have reincarnate him. So DxD wouldn't happen and Issei would just continue doing stupid things with M&M.