Moon’s Eye Plan and the 4th Ninja War
So all that Madara desires is to have the power to be able to control everyone. He said he will be able to have that power when he collected all the power of the tailed beasts. The 10-tailed beast or the Jubi will be revived, and he said that he is capable of being the host of that beast. He also added that the power of the Jubi is the combination of the tailed beasts including Kyubi which currently resides in Naruto. This kinda proves me wrong when I assumed that Kyubi was the strongest beast that has the power of all the other tailed beasts combined. Basically, Madara has collected all other beasts except the Kyubi and the 8-tailed beast who escaped from Sasuke.
Also, one of the reasons why Madara and other Akatsuki members attacked the meeting of the 5 Kages is to ask them to cooperate with his plans, that is the Moon’s Eye plan. He asked if the Kages agreed and willing to bring the tailed beasts to him, and when the Kages did not agree, he declared the 4th war. Danzo was not there and gives me a hint that another plan or secret is going to be revealed in the coming chapters.