Ninja sealing tools our out on the battlefield somewhere
Infinite Tsukiyomi is in effect - only the Edo Kages and Kakashi, Obito, Sakura, Naruto and Sasuke are unaffected (but Sasuke has full immunity while the others have to hide in his Susasno's shadow or something).
Naruto and Sasuke have powerups from Sage of Six Paths.
Sakura uses the seal that Tsunade has - tanks a hit but still useless.
LOL Obito (still alive probably).
Kakashi loses sharingan eye to Madara, Naruto regenerates new eye (non-sharingan).
Madara gets backstabbed (pun intended) by Black Zetsu, who turns out to be the 'son' of Kaguya who is (wait for it) -
The mother of the Sage of Six Paths and his brother (and Chakra, yes I'm serious), who's part of the massive tree thing or something. No idea how she gave birth to human kids but whatevs.
White Zetsus are the remnants of the last group of suckers from the last time Infinite Tsukiyomi was cast.
And most recently from this chapter -
IT WAS BLACK ZETSU ALL ALONG! The stone tablet was edited by him, every event was leading up to bringing the Juubi back by him!