It will go something like this:
Madara: You cannot defeat me because you have friends. FRIENDSHIP SUCKS!
Naruto: Blasphemy!
Sasuke: Let us defeat him with our friendship
Naruto and Sasuke (and maybe K11): Friendship no Jutsu
Madara: Impossible! How could frienship win!? Noooooo.......
Well, they're all ganging up on Madara already, so.
Pretty much, but it'll be all because on the sands in Madara =D
Madara will probably kill himself as soon as Naruto starts talking him to death