User blog comment:Staw-Hat Luffy/Why Kaido?/@comment-5386071-20130204191701

-This might seem far stretched.

I think the reason Law is focused on Kaido is because Law has predicted that Don F will stay as a Shichibukai so that would lead to Kaido sending some troops to "Take care" of Don F. Which makes Kaido weaker and easier to attack.

And the reason hes not hitting big mom is probably because Kid, Basil and Apoo are planning to wipe her out .. or atleast try. And the reason Law knows this is because he/they planned this. =D