It means someone is off to Arsenal Hard to see them signing someone who suffered a career threatening injury last season until there is some evidence he has made a full recovery
RE: Yes Rumours were that Arsenal wanted Muller as a replacement for Lehmann, and Lehmann has now gone. I'm just speculating, there's nowt else to do really.
RE: It means someone is off to Arsenal I am sure medical opinion would be enough at this stage to say that he is more thank likely to make a full recovery. Most do now after this type of op. And they will only be having a couple of million punt with wages. Not much when they could end up with a 1st team GK for the next 5-10 years. Hopefully Wenger will have moved on to someone else while Muller has been injured.