I vote 3 for average, this is why.
You did what you needed to do, which was annouce yourself, but that is all, you accomplished your goal.
What this promo needs is a little more flesh, you should have held back on the announcement for just a while and maybe wrote a little to make people wonder " is here here to help, is he here to insult, or is he here under Sommer's orders to back up the fact that DvH HAS to wrestle in this match."
You really needed to explain why you took this challenge up, in order to build some face heat. the fact that you sdid not makes this promo acceptable, but nothing very special.
No real problem however you can work on it still, or if not, take what I say as constructive criticism and simply build your character, as is, we know your likely one of the good guys, but really nothing else.
I hope this helps, and I do apologize if you take it offensively.