Xicor

AF stands for April Fool.
It's a joke that started a while ago loooong, and no.

There:
DragonBall
Dragon Ball Z
Dragon Ball GT
Dragon Ball Kai
Then, movies and promotions.

No AF is not real. The Dragon Ball series ended (badly) with GT.

Well, there is a little, but its purely fan made. For example, go to YouTube and search dbaf toyble. This is not the work Toriyama, but its still damn good.

AF can occur in April fools, but as far as I know it's a real fan fiction .... it exists but as far as the current series is concerned does not sound real.

No, because AF is not true at all. There is no such series or SS5