User blog comment:B214/Talk About What You Want! 2/@comment-74.77.52.225-20140801025045/@comment-1359322-20140801143322

I'm not saying that Issei can't become a High-class Devil. I'm just saying Issei has to prepare for a lot of stuffs before he can become a [King]. The preperations isn't something that Issei can just do within a few years, it'll take him a long time. Also just having fame doesn't mean they can have sponsors. Remember, Issei is just a Reincarnated Devil, Pure-Blooded Devils might not be fond of Issei and his fame.