There will be a moment to finish Madz

[Perlmutter]

Madara can not escape te Kamui dimension with both rinnegans. He will have to keep Obitos sharingan until he gets out. This will mean he has to take out Kakashi's eye and put the Rinnegan inside while on the battlefield

Naruto and Sasuke will haw to make a move then or pull something else out, if we're to believe what Obito said about Madara with both rinnegan

 

[Flakez]

Pretty sure Madara will have both his rinnegans.

 

[LordDarui]

Madara will transplant his rinnegan before you could say "Sakura is useful"

 

[Limbo]

Or, BZ teleports him out using Obito's body lel

 

[Perlmutter]

He can't escape Kamui with both rinnegans, he needs one of Obitos sharingans to get out, meaning he will be putting it in on the battlefield

 

[ᖇ α z m α η]

Or, BZ teleports him out using Obito's body lel

^Precisely, also on a second thought Madara would be a God with both the rinnegans cant there be a another loophole for him to get out of the dimension.
Kishi sometimes pulls weird stuff out.

 

[Xāvî1]

so does every one else