>In every single multiverse RP, somebody joins with the sole intention of having their character dominate everyone else and be the most awesomely powerful one.

Vita has kind of said repeatedly that if a character's so overpowered that it's just going to dominate everyone, she's not going to let it in. Not in those exact words, but she HAS rejected characters/ideas for being too powerful, so I don't think there's much risk of that happening.