As someone who believes that Sanji will fight and defeat Ryokugyu, I will address some of the future downplays you have predicted in this thread.
"Sanji is not fighting an Admiral at best vice admiral"
Pure stupidity. For one, not one Vice Admiral in this manga has had any narrative buildup for a Sanji fight, and no particular character traits that would foreshadow a conflict with Sanji.
Ryokugyu however has been literally oozing “Sanji fight” energy from almost everything we know about him.
1. Ryokugyu is currently fasting, Sanji is a cook. The obvious narrative foil of a man who does not eat fighting a man who’s role is to feed people should not be lost on anyone.
2. Ryokugyu is not only a man who does not eat, he is also a metaphorical glutton because of his nutrient-sucking ability. His (real) character reveal revolves him almost literally “eating” several members of the Beasts. This again would make him not one but two versions of a cook’s worst nightmare: someone who doesn’t eat, AND someone who eats way too much. So from a metaphorical perspective, Ryokugyu is both of Sanji’s worst nightmares at the same time. The only way Ryokugyu could have more “EOS Sanji fight” energy would be if Ryokugyu himself was actually a beautiful woman. Lol
3. There is of course the moment where Ryokugyu states that he might break his fast if a beautiful woman tried to feed him, which again paints him as having similarities to Sanji (though we don’t know much on this yet or if Oda will ever expand upon it really, could just be a gag line).
So yes, Ryokugyu has some very heavy narrative foils to Sanji, so much so that there is no way (imo) that Ryokugyu will not be a major Sanji fight.
"Sanji Confronting an Admiral doesn't Mean He'll Beat It, at best Appo Drake Killer 10thousands of fodders Will help him" Someone Will Take Over" "He Won't Solo An Admiral"
I think Oda may pull something similar to Sanji vs Queen where both Sanji and Ryokugyu will already be wounded by the time they fight, Oda will keep it vague as to what would happen if both characters fought at full health, because Oda even at EOS will want there to be some vagueness about his power levels.
"weakest Admiral"
Until Oda starts giving explicit statements on the Admirals’ strength level, there is no such thing and all Admirals are virtually equal.
"Actually only Sanji's Admiral is not one of the strongest military Forces of Wg"
They already say this about the Admirals now so prepare yourself lol. “This WG fighting force is actually stronger than Admirals!” Lol