User blog comment:B214/Volume 23 discussion blog/@comment-30329599-20170322023343/@comment-30924344-20170322041151

If I made the DxD anime (which I seriously do want to do), I would do the seasons like this:

Season 1: High School DxD: Slash x Dog

Season 2: High School DxD: Diabolos x Phoenix (First arc)

Season 3: High School DxD: Excalibur x Dragon (Second arc)

Season 4: High School DxD: Ragnarok x Heroes (Third arc)

Season 5: High School DxD: Mages x Lucifer (Fourth arc)

Season 6: High School DxD: Blazing Truth × Morning Star (Fifth arc)

First season has 14 episodes and all are 40+ minutes long. Season has 10 episodes and all are 20-30 minutes long. Season 3 has 19 episodes and all are 20-30 minutes long. Season 4 has 25 episodes and all are 20-30 minutes long. Season 5 has 30 episodes and all are 25-40 minutes long. Finally, season 6 has however many episodes (currently 13) and all are 25-40 minutes long.