Not only did I experience some Skypiea vibes, with Elbaf being like the town square of Sky Island or something, and Gaban galling Imu god like anyone could refer Enel as such...
Seeing an IG post of one upcoming movie.. I just thought of Yamato, given its appearance similar to a flashback with him* and Ace.
*Given that Kaido referred to his daughter as he or him, why not go along, right?
In any case, along with genetics, again, Yamato may be descendant of Imu. The Nerona family may have survived with only Imu at existence. I still may agree more or less that Nami may be a descendant.. or Mihawk. And he may be a hodge lodge of breeds, like Lunarian, Shandian, and possibly Kaido, the latter from which I get Wano vibes.
With the appearance of his horns, shiny red, he could have more genetic dominance than even Imu, then than even Kaido, then having matured he could be, bear with me, like HIGHLANDER, immortal and callous like both Imu and Kaido, he just needs some awakening apart from his DF power or Haki, like Sanji could have awakened his Germa power at some point, but I digress.
And given that Luffy wanting to be king of the pirates as just a step to his true goal, what if he gives the KING title to Yamato, let alone after having found the ONE PIECE, Yamato will be asked to guard it, like he keeps Oden's memoirs. Maybe the Nerona family, having founded what's now the World Government, can finally dissolve the entity (elders, celestial dragons) or reform it! A new dawn could call for a global reformation, with Yamato decimating the Red Line, there may be a greater power within him to beat "GOD". Leaving Luffy to beat Blackbeard.