I don't like how Madara's declared war like this...
It was essentially him, Sasuke, Zetsu, and Kisame (I'm not counting Hawk) against the whole freaking Ninja World (Kabuto hadn't joined him yet).
I mean, what kind of a cocky jerk declares war on a whole world with a total of 4 people on his side? xd Sasuke didn't even know that Madara was planning on declaring war, lmao! Sure, Madara's got control of the tailed beasts, but the Kages have dealt with them before and they can deal with them again. Likewise, they've dealt with Madara before, and they can deal with him again. So what is the big idea? How is Madara any stronger than he was before? Shodaime single-handedly defeated Madara AND the Kyuubi simultaneously, and now Madara has apparently LESS power than that, seeing as the Kyuubi is more powerful than all the other tailed beasts put together, and considering the fact that Madara only has 7 of the 9 tailed beasts.
Madara's no stronger than he was before when he lost - in fact, he's weaker. Maybe with Sasuke he's a bit stronger than he used to be, and maybe with Kisame and Zetsu as well. But if he's stronger than he was, he isn't significantly stronger. And before, Madara lost to ONE GUY. Now, he's fighting a whole WORLD. I don't see how he can expect to win, which begs the question: has Madara gone completely insane? xd