By Christmas he should know whether to call it a day for us. His one last proper summer of spending(ish) to come and if things dont work out surely he has to see that he has taken us as far as he can and a new approach or new coach is needed.
The other question is if he indeed leaves in summer 2014 is how long will our board dither to hire a new manager? Will they be spending the summer desperately trying to get Wenger to sign and then leave themselves with no time to get a replacement or indeed get the replacement the targets that he wants. If he decides to go they should line up someone to takeover ASAP.
this wont happen and so we will waste next summer.