You guys all fail. He means if Sasuke got perfect susano'o who would win. I'd have to go with EMS Sasuke most likely, though that's only if the susano'o can tank the equal to 5 biju bombs TBB. If plot was included they both have so much armor that it would be impossible to tell. What I see is Sasuke getting perfect susano'o and fighting Naruto, but Naruto shows him the light with talk-no-jutsu and they team up to defeat the last enemy.
no, we cant really anticipate the battle specially if we dont know the powers of sasukes PS.