1. A weapon plus creation using the DNA of xavier and magneto to create a military controlled onslaught.
2. An arch nemesis for superman made up entirely of kryptonite.
3. A bad guy that is aware that he is actuallly in a comic book fantasy world.
4. An evil celebrity bad guy who is under constant public scruitiny, and will cause the public to turn against the group that kills him.
breaking down the 3rd wall... She-Hulk already did it...
but a villian....hmmm.
how about some huge unstoppable supernatural shadow who goes around trashing heroes. someone who is unstoppable....but is actually the creation of a 6 year old boy. A boy who loved heroes but was accidentally put in a coma by the avengers or someone. Now he projects his hatred through this gigantic apporition. I can't think of a cool enough nightmarish design....General Grievous is already taken (see my avatar).....
how about a featureless shadowy human with red eyes. wearing glasses, a grey trenchcoat, a white shirt, black tie, and a grey hat. just like the kids dead father...
well hows that?