One thing that I look forward to every year at convention time

extreme AH wacky weirdness

I would love to see King Kong, Godzilla, Mothra or any of the other great things that HTC brings us for the final "fantasy" night of the convention.
Yes for your wish on that night.
No, for your wish for an arena. Other than those that just say it is a bad idea, I will give you something to think about. Your idea obviously is intended to bring in a fun factor to the game. As proven by the success of the yearly convention missions, folks do enjoy a comical twist on their normal routine.
Where the idea goes south is just as much a part of human nature as the desire to break away from the routine. After about the 5th or 6th time that King Kong has

human nature takes over and you start analyzing

until you find a weakness in that monkey's "quah". Pretty soon our silly cartoon

will have entered into the Tetris zone, dodging certain pixel generated shapes

and attacking others. (pretty much what we are doing now).
So let us have our little illusion for a while longer that one day History Channel will be interviewing us

and our squadmates for re enactment, re enactments