If my head stays as is, a nice, friendly lovable cyclops, I am happy. If my weapon has rocket somewhere, even if impractical or entirely useless, I am happier. And if a green and purple colour scheme is involved, I believe I may do something that the young children should not know about yet.
As for your description of an intro... Without adding any real detail to it, it already contains the mindless violence that I believe is a must.