User blog comment:LionRed/Laws plan/@comment-5640399-20130210184031

When planning to take on a Yonko, Law would have had to consider all four and their respective powers and connections. With Kaido, he knows he can't attack him because DD will probably allign with Kaido to protect his investment, leaving Law taking fire from two of the heavist hitters in NW. He also knows Kaidois amassing power through DD, and through his connection to DD Law knew or found out how and where the Smiles and SAD was produced. If Laws plan is to turn Kaido on DD then destroying the SAD factory and kidnapping Caesar is an obvious and key move, but now, with DD aware that war is iminent, his next move will be to utilize all his power and influence and prepare while using what litte SAD he still has at his Smile factory to keep Kaido at bay, he may even try to get aid from anothet Yonko, and with all these preparations, there is a chance DD could win! Which is not what Law wants, DD knows Law is coming for him if he becomes a the new Yonko, so Law needs to kick this war off before DD has a chance to prepare, by destroying the Smile factory while DD is on Punk Hazard!!! End result, Kaido is weakened by a tough but managable battle with DD and Law has more time to prepare an attack on the beast.

Good plan in my opinion, and it may well work. DD shoulds stayed at home and let his soldiers do the fighting, it could come round to bite him hard and soon.