What's with epic orchestral music and D minor? Whether it's in a film or a video game, most music is played in the key of D minor. Perhaps there is a 'composer's secret' where the key of D minor gives a more epic feel to the piece. Or maybe it's just the easiest key for the orchestra to play in (notably for the violins, as one of their open strings is a D4).
Good examples of such epic music include the soundtrack to the Pirates of the Caribbean movies (just look them up on Youtube). And, of course, who could forget Chevaliers de Sangreal?