Okay so dragon not being Garp’s blood son is in no way a new theory but still. Like oda loves to do with a lot of characters/plot lines I think he might’ve made kyros a mini mirror to dragon
That basically being what Riku did for Kyros by hiding his past and letting him join his army. Also in hopes he becomes more
They also had kids they weren’t allowed to see in order to keep them safe
Similar to how Scarlett is Riki’s daughter luffy’s mother could be Garp’s biological daughter
Kyros vs the champion of the dressrosa colosseum
Dragon vs the champion of god valley