WI Shaka kaSenzangakhona had a son?

What if Shaka Zulu had a son? Say, in his 20s or so so that if he gets assassinated in his 40s like OTL his son is the right age to inherit.
 
I think I read that Shaka avoided having any children deliberately because he was afraid that they would threaten his own power. But if he did then surely his brothers would kill him too for their own safety.
 
Top