If you were a creator at Marvel Comics, and had free reign for a story arc in the Avengers (any series, mini series, one-shot, whatever!)....
Which villian would you take out permanently?
That is, you have management approval all the way up the line to kill off a villian, any villian you like. You need not get approval of an editor, you've already got it.
But, and this is the catch, you must explain or justify WHY you want to eliminate this villian. You may do so in any method, or to develop any conflict, plot development, or crisis that you intend. You just have to explain it in your posting below.
So who will it be?
Which villian will you kill off permanently?