I find becoming evil is a convoluted process and in the show there are many characters who are created evil such as piccolo being by King Piccolo or the androids by Doctor Gero,even through they did not stay evil for the most part i think that in character creation you should be able to choose you alignment. This would allow role playing servers to have a richer story from the get go and give people who wish to be evil a alternate story to follow. I would also suggest for a evil story line from the beginning, let us train with piccolo before he became a good guy to start out, or even raditz, and progress through the story on the side of the villain. The building blocks are already there from different Dragon Ball games and i feel it would add a greater depth to the game.