User blog comment:ChiroSamai94/Meeting Doflamingo/@comment-1595565-20100829235227

The way I see it, he will be their enemy, not because he's a shichibukai, but because of their philosophies. Doflamingo thinks the new era is where dreams go to die, while Luffy's dream to be pirate king is what is ultimately fueling the whole series. Doflamingo will trash Luffy's dream, Luffy will get pissed, Doflamingo will smile and laugh demonically, and the battle will ensue.