I wouldn't doubt that the admirals are going but Sakazuki is not leaving post to go to Wano because he has responsibilities as Fleet Admiral.
After the comment that one of the Vice Admirals made, he said that the only ones who can stop those two yonkos are all the Admiral level people
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the Warlord level people and since the Warlords lost 3 powerful , my bet is that they send the Admirals.
The admirals of old is not going except for Borsalino, Issho will obviously be of first choice because he is a swordsmen, and maybe Greenbull will make his appearance after the Reverie.
In short, you're going to be wrong because Sakazuki's position and Kuzan's affiliation.