SummerSlam was a professional wrestling pay-per-view event produced by World Wrestling Entertainment ( WWE ) , which took place on August 17 , 2008 at Conseco Fieldhouse in Indianapolis , Indiana . SummerSlam ( 2008 ) was a professional wrestling pay-per-view ( PPV ) event produced by World Wrestling Entertainment ( WWE ) , which took place on August 17 , 2008 at Conseco Fieldhouse in Indianapolis , Indiana .