Ken Norton has the perfect style for boxers. He is extreamly atletic and with this cross arm defence can block streight punches all day long! His only problem was that he didn't duck, but against boxers he is just perfect. He will give W hell of a night and most likely KO him because of better endurance!
Against Forman... Wlad isn't the one punch KO artist. I don't thing he can hurt Forman. If you can't hurt him he will just walk through you! W is to big and his stamina is bad because of that!
I don't want to take anything from W, but almost all his oponents were really non educated boxers with bad technique(the mexican punching bag type)... I don't see him against someone so accomplished like Louis. There he won't be able to clinch. In order to stop some how Louis not to go inside and unlish this short punches W must go really low. This means he wont be able to move. To use the right hand is almost impossible beacuase of the way Louis stands... It will be nice batering