I hate to sound like an ass, but it must be said.
If this is your first animation, then its not so bad. Here is my review.
Overall, the graphics are just stickmen fighting. There is nothing much that had a lot of detail. Although stickmen can be used as something like "Stick Fight"; you don't give much to hope on. Spend more time on your people inside the flash and try to make some rooms.
The whole Dragonball thing has been done to death. Complete death. Please use more originality with your next flash. You'll get more points that way.
The sound was not too, too bad. Use something else next time. Linkin' Park, as said before is rather old.
You have a lot of interesting concepts for future conflict. This is what I liked the most out of your flash.
1) You do have some good hints for future conflict.
2) You used the music rather well; although overused.
1) Poor animation
2) Couldn't really tell what was going on. It was all over the place.
How to improve:
1) Focus more on the animation.
2) Use better music.
3) Define a good storyline for your possible series. Doing so makes the whole flash creation process a lot easier.
I hope this helps. Good luck!