User blog comment:B214/High School DxD Born Final Episode Review/@comment-3965848-20150622201857/@comment-3965848-20150622205947

Technically it took 2 years for season 3 to come, because the studio was working on Bladedance of Elementalers and Kenzen Robo Daimidaler in 2014.

But hey, that only encourages your point about how long we are able to wait.