User blog comment:Kaido King of the Beasts/Future of the One Piece Anime/@comment-1940096-20150824234442/@comment-5398287-20150826042321

As I recall, they began skipping cover stories after Diary of Coby-Meppo and Buggy's Adventure because the ratings simply weren't anywhere near as high as those of an episode focusing on chapter contents. Don't get me wrong, I'd love to see more animated cover stories, but Toei's got a capitalist mindset like that - as do many animation companies.