Madara still exist.

[Uchicha Macho]

Remember Madara have 4 limbo clones present on the field,they are doing his work.When Kaguya take over ,she have to fight these four limbo clones

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[Its sasukebase]

maybe......

 

[The Work]

It don't matter Mother Kaguya probably has control of them. He's in the fodder line now.

 

[Usuitamaki]

We know... Lol let the fodders have fun we the maddy fans shall have the last laugh.

 

[ᖇ α z m α η]

Madara had the opportunity to swap with the Limbo shadow

Spoiler

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Although in the following scenario he does not have that opportunity (His face shows the agonizing pain)

Spoiler

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Note : I would agree with the fact Madara still has some role to play and not to be ruled out from the plot​

 

[Alfred Pennyworth]

great thread...
madara would probably use substitutions too