I highly doubt that Madara can be defeated that easily . He should be able to detect bad intent like Naruto . He should have both the power of Naruto and Sasuke . So he should be able to notice that Black Zetsu is onto something . And I think he did .
Look here ...
I think in the bottom panel he noticed something about Black Zetsu . And that's why he tapped the ground . I think he might have some back up plan . Kishi cannot just destroy Madara like that and bring kaguya who has been introduced only several chapter ago . Madara has to be the final villain . Maybe kishi is bringing Kaguya only to be defeated by Madara and make Madara the most powerful .
The worst case would be Kaguya's return and then Madara joining force with Naruto and Sasuke to finish Madara .
Look here ...
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I think in the bottom panel he noticed something about Black Zetsu . And that's why he tapped the ground . I think he might have some back up plan . Kishi cannot just destroy Madara like that and bring kaguya who has been introduced only several chapter ago . Madara has to be the final villain . Maybe kishi is bringing Kaguya only to be defeated by Madara and make Madara the most powerful .
The worst case would be Kaguya's return and then Madara joining force with Naruto and Sasuke to finish Madara .