There's no guarantee. It'll probably be like WoW, with a certain amount of color, style, class, and race options. This means that there will be a definite amount of options (however many there are) to choose from. That means that people will probably come up with the same design. This means that, like Xan said, there will mostly be a certain few character designs. And since everybody always wants to be that one character, it'll end up being the characters from the show. Very unfortunate, but with a property like that, it's hard to avoid, no matter HOW many options there are to choose from.