^Not exactly. While it's true that he didn't have any real liabilities, he actually threatened
to quit the Shickibukai.
Finally found that page. Been looking for it for ages, I forgot a lot about OP.
After this chapter that page looks like a hollow threat. Not that I want Doflamingo to do something that he was never said to be able to do or that I hyped him too much in my mind, it's just the hype that the manga itself gave to him. Him talking about a New Era and shit and now being all scared of Kaido (whom we never even saw) and in dilemma over one guy (Cesar) doesn't suit him. At all. Boss of the underworld would care for his business, sure, but he would more be worried about his name getting dirt by some punk kid then death.