People have been taking Tobirama's comments about never seeing a kagutsuchi that strong to imply that Madara has amaterasu. however, kagutsuchi simply means the shape manipulation of the black flames, not amaterasu. sasuke as we know is a master of shape transformation, he has blaze release which is just that and various shape manipulations of chidori. tobirama was just praising the shape manipulation of amaterasu combined with naruto's rasenshuriken