First off no he didn't... never said that unless you show me the viz interview.... and I will count mine invalid because I don't have the link either -_-kishi never said itachi could beat madara infact he said itachi would need ems to even have a chance. and that was obito who he thought was madara :/
Kishi though Obito was Madara? INVALID Kishi knows all about NV...
Also Obito still has no counter for Tsukuyomi or KA