User blog comment:Omega natsu2/Chapter 385: Spirit King vs. Demon King, Predictions./@comment-4829046-20140517175753/@comment-4829046-20140518124751

They said they wouldn't acknowledge him as their superior, doesn't mean they entirely disagree with his words. Just need them to see him as the person they should serve and that shouldn't take too long. Would be nice if it concluded in another dungeon though, giving them more time to think and all that.