Correction: Sasuke didn't have the body to be compatible with Sage Mode. That was 3 years ago when he was a kid. Sasuke's stamina has grown immensely since then. Even if it hadn't, Kabuto didn't need a strong body to become a sage. Gene splicing solved that problem. And Sasuke' already received his gene splicing from Juugo.
That version of Naruto should murk every shinobi in the series