Sounds more as the final dramatic cutscene of a very epic game. Not too much of a battle theme.
However, if I think it through, this would fit a final battle in which the outcome is pessimistic whether you win the battle or not. Some sort of unevitable fate trying to be fought by one last hope that shines in the middle of the dark. There is some sadness to it, some kind of "everything is lost, but I may as well die fighting" kind of atmosphere.
Well, screw myself, this is a great battle theme.
Thank you for this piece.