Hey All,
Just wondering about the person in sixth coffin, does it really has to be someone of whom Madara is afraid of, I mean it could be someone who he deeply cared for, thus eliciting the words "You truly are a monster..." when Kabuto shows him the person in sixth coffin. Also, remember we're still not sure the person behind the mask is Madara, bcos of how Kabuto said "So you go by the name Madara now". Could simply be because they used to know him as "Tobi" but could also mean that we need to look underneath the underneath.
Also, if the character in the sixth coffin is indeed someone whom Madara cares about then these means some chapters will be dedicated for flashback no jutsu. I know we're too far in manga/story for a new character as it sounds absurd, but think it this way, this means Naruto for an extended time for us