So hear me out
I don’t think the first Nika failed, he just couldn’t finish the job but left behind the Ancient Kingdom to finish what he started although I believe he lived as the strongest of his era and died from natural causes.
Joy Boy was Nika’s descendant and had a “Zoro” which was not in the first world but still failed
Now Luffy has “Zoro” + “Sanji”
I don’t think the first Nika failed, he just couldn’t finish the job but left behind the Ancient Kingdom to finish what he started although I believe he lived as the strongest of his era and died from natural causes.
Joy Boy was Nika’s descendant and had a “Zoro” which was not in the first world but still failed
Now Luffy has “Zoro” + “Sanji”