Sounds like... I can only describe what's going through my head:
A 'hero' or main character or something after a long battle kneeling/collapsed next to someone (dear to them?) who had been hurt during the fight. They feel anger surging and look up, lifting themselves with some difficulty from the ground, a strange glimmer in their eye. Their fists clench at their side, and a power flows through them. The enemy can feel a chill run up their spine, like a warning of what is to come...

Goodness this may be one of my favorites by you just because it was able to send images flying through my head like no other :D

Though I couldn't tell you WHO or WHAT the theme should be for.

the song reminds me of a person kneeling at a grave of someone remembering all that they had been through and all the sacrifices that had been made , before going to the final fight.