Captain America & Marvel Boy vs Batman & Superman
Old School Heros vs Batman & Robin
Captain America- http://www.internationalhero.co.uk/c/capamer1.htm#1950s
&
Marvel Boy- http://www.internationalhero.co.uk/m/marvelboyatlas.htm
vs
Batman- http://www.dcdatabaseproject.com/wiki/index.php/Batman
&
Superman- http://www.dcdatabaseproject.com/wiki/index.php/Superman