User blog comment:JustSomeDude.../712 - The Implication/@comment-4754162-20130627160513/@comment-4754162-20130627170638

Thanks for that. You are one of the few who I can take words without hesitation as I know you will know your subject enough to preach about it (I myself sometimes fail at this ^_^)

Here I have a thought, a speculation if you like, about this subject I wish to share out. I may be proven completely wrong in the end but at the moment allow me to get this off my chest:

What you have just assumed is EXACTLY what Law is thinking (and what Oda wants readers to follow as well). There are still lots of plot holes haven't been filled up yet at the moment, so Oda gives enough hints that generally lead us to summarise to that idea.

(DP may scold me for overthinking this ^_^) Doflamingo may have this grand scheme which involved Kaido as one of his "game" pieces. This suggests that Kaido is being used by Doflamingo to remain in power and influence as a Yonko, so he (Doflamingo) can do / access something. This imply Doflamingo has his strings (leverage) over Kaido, with the latter may or may not be aware of it, not the other way around.

When Law interrupted the Smiles, Doflamingo was actually annoyed, rather than fear, of the outcome that Kaido will fall, being his single point of failure that may get his great big grand scheme facing unnecessary setbacks. Doing what it takes to prevent failure, he resort to use his Tenryubito card ("either Doflamingo is a Celestial Douchbag himself, or the bastard son of one, or even a former slave, or maybe he just has a really influential girlfriend") to setup this plan to trap (and kill?) Law and getting back Caesar to continue to get the ball rolling.