Not bad.
I could see this being used in a flash submission, but I can't imagine it during a battle though. It just doesn't have that battle touch to it, but I think I can see it being used during the credits of a video game like flash submission.
Whether it be a game or a movie it would probably work. I think that a boss battle or even a regular battle has a little bit more of a darker sound to it. Something that makes you think that danger is there.
It still has a little bit of an Epic feeling to it though and overall has a really catchy beat to it. Pretty good length in the submission and decent variety all around. Good job.