[Spoilers] Madara is still amused

[Edge]

Only Hashirama will EVER get him to be serious. If you know what I mean...

 

[SIR HERDERP PRESIDERP SDO]

I wouldn't be so sure.. His expression more or less suggests being surprised+frightened/scared/worried about Naruto handing out all that Chakra.

Spoiler

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That was my impression of Madara on the right-corner of the page.

And don't forget he probably got tingly hearing PAF! PAF! PAF! PAF! , spell that backwards and you get....

 

[Strata Uchiha]

And don't forget he probably got tingly hearing PAF! PAF! PAF! PAF! , spell that backwards and you get....

^ Believe me, Madara was not thinking "Oh! Maybe I should get Naruto's face engraved on the other side of my chest."