The music is a nice touch and adds intensity to the battle. Your animation is pretty good, too. However, you need to be more consistent with your drawing. Some frames look better than others because you obviously don't put in the same amount of effort into each frame. You need to be able to draw things so they match in different frames.
For example, in the opening animation before I even click the play button, Bardock's hand and body are both poorly drawn. Then a few frames into the movie, you drew Bardock much better. You can't have him drawn well in one frame and then drawn somewhat poorly in the next one. That's not good quality work and you need to fix that before you finish this.
So, in summation, what you really need to improve is your consistency, so your frames match up with each other. Put the same amount of effort into each frame and make sure you don't leave out certain details because that happened a lot here, too. For example, you'd have the lines on Bardock's armor in one frame and in the next they'd be gone.
A lot of work needs to be put into this to make it a good final project, so I hope you commit and make this a really good animation! As a Dragonball Z fan, I'll be looking forward to it! You can do it! :)