It is possible that the term "the new emperors" is an exaggeration of Morgans as well. He likes to put some hype on him What is certain is that in the newspapers it will be written that Luffy beat Kaido 1 against 1, that the Mugiwara crew beat the hundred beasts crew.
That Luffy awakened his fruit in Nika. And seeing how Morgans loves Luffy he is able to tell that Law, Kid, Marco were under Luffy's orders. And that Luffy told Law and Kid to take care of Big Mom while he takes care of Kaido.
Morgans had done something like that when he recalled Luffy's exploits to WCI. I think it may be possible that Luffy is affirmed leader of the alliance, in addition to having recruited Jinbei (and perhaps Yamato unconfirmed for now).
What do you think guys ?
@MonsterKaido @Luffy is the mc @Pantheos @rerere @Echizen_Jo_Ndule @Paperchampion23