The chapter starts with another intense stare off between luffy and doflamingo, the stare will contain some useless talking as per usual. Doflamingo will say something personal and luff will go ape shit entering 4th and attack doff with everything he has. Doflamingo will also charge in with everything he has, the pannel will then be switched to another scene with other characters, most likely to Gatz or the people pushing the cage and they will scream like go lucy! But this won't be enough, doflamingo will be ahead in the battle and will slowly start to gain the advantage. Luffy will then be on the brink of death but he will use some new super secret ultra special attack and ko doff. In the chapter the gravity is pushing away from his, towards Sabo. If you're suggesting that he creates a point that gravity then pulls towards, then he could also do that outside of the bird cage.