Wow. This chapter was so great i had to write about it. There's so much anticipation, but a few things were uncertain for me.
1) people are saying the 1st and 2nd hokages can't be revived because their bodies were sealed using the dead demon seal.
2) people are saying the 3rd can't be revived because he used the dead demon seal.
3) we just found out a few chapters ago that the 4th used the dead demon seal to seal the kyuubi within naruto, yet when orochimaru fought the 3rd in the beginning of the series he said that no matter what, he had to stop the 4th from being resurrected.
4) if the 4th already used the dead demon seal, then he should not have been able to be revived. this throws the whole theory out of the window.
5) we dont know what Kishi's gonna do. he might throw in orochimaru or jiraiya some time during the battle. really the possibilities are endless. I can't wait!
ps- i think the only person kabuto could show madara that would make him scared would be the sage of the 6 paths. that would be insane