User blog comment:B214/General Discussion/@comment-9595671-20160820093528

I wonder if the EX future will get another story one day? There's still some things we didn't see, like Le Fay's son who was only mentioned, didn't join the others due to circumstances and didn't even have his name revealed.

And I remember hearing Issei has atleast 20 children in the future, which at the moment if I've counted right is more children than girls in the harem if each girl only had a single child with him.