New diagnosis

Hello

i am a mum of a 23 year old who we have suspected for some time has been on the spectrum. He has had a full assessment and tomorrow, we see the consultant for the outcome of the assessment. At the end of the assessment we were told that it has highly likely he would get a diagnosis, more than likely to be along the aspergers side of things.

I guess my question is, what should we be asking at the appointment tomorrow?  If he is given a diagnosis what happens next? 

Thank you for any advice