User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-5480911-20140628223319/@comment-24502975-20140629170108

You sir, are awesome for having such views like a lot of others here. :D

So far, Ishibumi doesn't have any intention of ending the series until he runs out of material to write about. After this arc, we have one last arc in DxD: Destruction God Shiva arc. Since this current arc and the next one will take quite a while to finish, it's safe to say DxD will continue for years to come. And if they adapt all of the novels, then yes, DxD's anime could have over 100 episodes.