if we can keep Kos & BFG fit, then I wouldn't be overly surprised if Chambers plays the DM role (which in all honesty, I believe is a good thing).
I know some people have reservations about Welbeck (myself included), but I do have a feeling that he may well do a "Sturridge" and shine for us.
I always felt that the main problem we had was that our spearhead for the attack was a HOLDING player, and not 1 that would pressure Defenders. This meant that Ozil's only real outlet was Walcott, and I don't believe that it was a mere coincidence that Ozil's form plummeted when Walcott's Season ended prematurely.
With the purchases that we have made this window, I think Wenger is very much looking to build the Team around Ozil and providing him with a pacey forward line to run at the defence and make the most of his through balls.
I wouldn't be overly surprised to see the team look like this when all are fit:
Chez
Debz - BFG - Kos - Gibbs
Chambers
Ozil - Ramsey
Wally - Welbeck - Sanchez
Personally, I don't think that's a bad line-up. My only concern is that this is solely dependant on Walcott continuing with his prior form, Welbeck achieving the potential that he was believed to have had and Sanchez continuing his swift transition to the EPL.