We lost one

In earths darkest hour all of its heros banded together to defeat Unicron. Batman, Superman, Masterchief, The Fantastic Four, The Power Rangers Wolverine, Captain Canuck, The Blues Brothers, Chuck Norris, The Autobots and the A Team.

In the ensuing battle all was thought lost until Master Chief dived right into the heart of Unicron and destroyed him at the cost of his own life.

He died a hero of earth defending its people from certain destruction.