Iron Fist

Danny Rand spent years training in the mystical land of K'un-L'un. At the age of 19, he fought a mystical dragon, and plunged his fist directly into the dragon's heart, granting him the power of Iron Fist

Earth's Mightiest
Iron Fist defeated Nova, Tigra and Black Knight in the second mini-tournament, moving him on to the finals. Unfortunately, he was immediately creamed by The Incredible Hulk.

Goin' Green
Iron Fist was an alternate, entering in the second round, and defeating Martian Manhunter.