That's already happened. World's Finest #192 Superman beats up Batman without any powers. Of course casual comic readers and Batfans doesn't know that this exists.
The one thing I never understood is how Batman gets beat up by the likes of Penguin, Bouncer and Silver Monkey, but then goes on to fight Superman. At least Captain America vs Hulk makes more sense because you almost never see Cap getting beat up by regular henchmen and thugs.