Let's solve this issue first..akainu was in the best position to kill Shanks here..Shanks only has one hand and can't even defend himself..Is it correct to say that he is afraid of Shanks?
Now about Kaido..We know he attacked him to kill wb..But why didn't the navy attack wb with two admirals to take less damage?
Kaido was preparing himself to fight all this time..Making artificial fruits and selling weapons..And we even see that he wants to make Kid and Luffy his subordinates..And this shows that he is not yet ready for war
And to be honest, none of the high level people are afraid of each other
Akainu was not afraid of shanks.
‘Beside shanks is swordsman but swordsman are not limit to only sword slash . They can kick or punch. Zoro did swordless move before. So shanks is not helpless without arm. Sanji fought with mostly kick without landing a punch.
old rayleigh did kick kizaru before and he is swordsman.
‘’If Akainu tried to attack shanks , shanks will pull coc+ coa kick, and whole crew would jump at him. Shanks simply have best speed feat . There is no explanation how shanks and his crew came to marineford out of nowhere after fighting kaido unless they have teleport devil fruit power.
‘’This same shanks can come to marjorie without two admirals noticing. Nobody know how shanks come and meet gorsei like that.
The marineford is focus on fighting Whitebeard crew, they didn’t expect luffy and other prison guy to aid Whitebeard pirates to create chaos.
‘Navy didn’t expect shanks is here at marineford. They thought shanks is fighting kaido. They got shook.
‘Kaido got his weapon disarm before yet kaido somehow quickly get his weapon easily. Zoro did same thing after getting disarm by king.
‘Oda want to draw shanks to grab his hat for dramatic effect.
About kaido want take opportunity on Whitebeard when Whitebeard goes to the war . It seem he wait for whitebeard to be weaken by war so he can kill and claim for frame, or other reason. Kaido didn’t attack Whitebeard before war.
Navy didn’t put two admirals on Whitebeard because navy believe one admiral can handle Whitebeard. They did fine job. Other admirals is fighting other people.
kaido simply prepare his army to be strong enough to fight world government. The reason he is afraid of big mom and her crew spoiling his plan on war plan because he is forced to waste his supplies on big mom and her crew. Like monkey d dragon is preparing revolution action .
Top tier people are not afraid each other but they are afraid they can ruined their plans.
‘Like kaido is not afraid of big mom but he is afraid that big mom can ruin his war plans.
Marineford is good opportunity for kaido attack celestial dragons , but I guess kong or super strong cp0 guys can fight kaido who guard celestial dragons when all admirals are fighting in marineford.