ok lets look at it this way.shang chi is so good at martial arts he was able to fight thing (correct me if im wrong) and he is the best in marvel. i would say that dc has no definite and ends up with a 3 or 4 way tie between richard dragon, lady shiva, bronzetiger,batman and now cassandra cain. so what iron fist can heal and concentrate his chi into his finger tips. does he has the skill to hit bronze tiger. oh and batman lost to him and when he prepared for the rematch it wasn't enough.