With one day of prep, Batman would have asked Dr. Fate for a spell to render Ice Man powerless, or contain his mind within his body. Ice Man still looses. Batman shoots Ice Man with that phantom Zone Gun. He gets a GL ring and beats the Tar out of Ice man. OMG so many ways I can think of that Batman would creme Ice Man. Of course this is with a days prep and full knowlegge of Ice Man's abilities.