This is not bad at all.
It kinda needs to be thickened out & a little harsher, but what you have so far isn't bad at all. Oh, & you should deff keep those two sirens that zoom in at the end, those create quite an adrenaline rush in themselves.
Makes me kinda wanna go through with my SS Vegeta theme cover I was thinkin' about doing. lol I look forward to hearing the finished version!
Please contact me if you would like to use this in a project. We can discuss the details.