User blog comment:Staw-Hat Luffy/Why Kaido?/@comment-5888163-20130204164713/@comment-4605926-20130205143511

I believe Law is simply involved with Doflamingo and Kaido more than he would've liked to be. He's simply afraid that if he won't take action they would eventually come after him (or anything else that would invoke this course of action) where he would stand little to no chance. Therefore, he wants to weaken them as much as possible and therefore deciding to go after Kaido specifically. Personally, I fail to believe that the Law + Luffy alliance is going to have any sort of chance against Kaido and Doflamingo let alone their whole crews. If you try and see the picture as a whole, you'd probably come to the conclusion that things happen differently now in the New World than they did in Paradise (the first half of the Grand Line) at least in the Yonkos' and other significant individuals' crews. It seems as if crews here consist of a large amount of members that are divided in different locations for different purposes etc.. Therefore, I believe Law's plan is to start wiping out lower-ranked members of Kaido's crew and sabotage his and Doflamingo's plans without the necessity of confronting them personally. Though eventually, they would probably come out themselves, the alliance might recruit more crews along the way (maybe even certain individuals into each's personal crew *cough* Jinbe and Kinemon *cough*) and hence grow stronger, giving them a chance against the full might of Kaido and Doflamingo (with their now weaker crews and power due to the previous assaults of the alliance).