LOL
Alright, I know you spent a lot time working on the humor and stuff. I admit that it is funny but you might offend some DBZ's fan.
Every parodies will have such a problem, especially in this wide community with lots of different tastes. The only way you could supress the negative parts is to apologize or at least to warn the DBZ fan.
In conclusion, your animation can still be funny if you use your own design characters. This not only show your originality in work, but it also shows your creativity. Try to come out a new series with your own character, finish this series first if you like but I'm sure your new series will have a better result than this. Well done, and keep up the good work!