Board Thread:Naruto Discussions/@comment-38812954-20191005125639/@comment-43776375-20191005132034

Being so deep underwater sure wans't an help in being reanimated, but nagato says something like "I should still be in time to save everyone in the village" so he referred at it like there was a time limit

Then black zetzu proceeds to revive madara who was dead for years, but maybe the edo tensei helped?