He's got a couple things wrong about the Avenger. Benson didn't have pitch-black eyes. Every story mentions how light grey, almost colorless his irises were. And it wasn't just that he was a master of disguise but that the flesh of his face was malleable and could be shaped like putty. This is such a vivid and distinctive trait that it's funny it would be passed up.
Still, none of this is the "real" Doc Savage, Avenger, Spirit, Rima or Black Canary. It's just still another take on the characters, and worth giving a shot to see how things develop.