User blog comment:B214/Volume 23 discussion blog/@comment-190.160.185.214-20170325175848

so how do you think the story will progress from now on? Ishibumi says he doesn't want to go beyond volume 30 with the main story, which means there's 7 volumes left. Volume 24 will be the end of the preliminary round, and if the story continues without big twists and turns, volume 25 will be the top 16 matches, volume 26 the top 8, volume 27 the semifinals, and volume 28 the finals, again, that's only if no bad guys decide to stick their noses where they don't belong....if what some people say turn out true and Issei does not face Vali in the tournament, volume 29 could be focused solely in their duel and volume 30 could be an after-story, maybe 5-10 years in the future.

For me those are the most predictable turn of events, althought it could go totally different, what's your opinion, maybe if the story goes like that it could be a bit boring...