@Azriel:
yes..maybe you are right, never think that way before, and that would be a great twist…using WB only as diversion... However, I dont think Dragon would be that easily to came out and save ace, he is a type of people who would abandon his ow child for a greater cause, he has done it when ace is still a kid, and I dont see any reason why he would come and save ace now.
Yes, while Dragon might seem to be the type, this event too, might seem irresistible to him. He can launch an attack from behind while they are busy fighting Whitebeard from the front. Making a coup is always easier when the government is at war with another side. And he gets to save his kid in the process, this is what makes me think that Dragon will show up, and the World Government will be expecting for him.
I have to disagree with those that thinks that the declaration of war is a foolish plan, or poor planning. The organization known as the World Government has been around for 800 years, surely poor planning is not the reason for it. In fact, I think i have another theory as to why the Tenryuubiito is given such incredible status.
The founders of the World Government will, of course, know their darkest secrets. Since there are 20 of those kings, who can say that the secrets are safe, and hopefully, lost in time. So instead of fearing that one day those secrets would come out and threatens their position, why not giving those descendants special treatments and facilities, that way they would be too comfortable and spoiled that rebelling would be the last thing in their mind.This is, of course, based on the assumption that the Gorosei (or whoever the leader of World Government) isn't necessarily the descendants of the founders