The point was that Batman would win in a fight. There was the one story line (Rebirth of Krypton I think), where the Kryptonians were released from the bottle city of Kandor. You had Kryptonians dieing by the hundreds of thousands to the U.S. military, that used all sorts of weapons created by Lex Luthor. There were normal soldiers killing Kryptonians with all sorts of exotic weaponry, like Gold Kryptonite laser pistols. For the uninformed, Gold K robs a Kryptonian of their powers with just one time being in its presence. In that storyline, you had Kryptonians that were every bit as powerful as Superman, getting one shot killed by Kryptonite laser pistols.