I wonder who Akainu gonna send to Wano nw, Drake has reported BM n Kaidou made an alliance. They are also baiting Dragon to come out in Mariejois. Abolishing Schibukai system might also need an Admiral to go down to Mihawk. The country Heads also needs to be escorted safely. While BB also is trying to outrun Marines in something.
So it's clear Marines forces are very distributed n thin to act on all the events together. My guess is only Battleships are going after Schibukai. Fuji n Ryo will stay in Mariejois and Kizaru will go to Wano. And BB also is heading to Wano to gain Kaidou df, or is gonna visit Mariejois.
One more question, why was Akainh unsure of Wano samurai strength when their spy Drake was already in Wano?