If he does, he does. Newcastle United soldier on regardless just the same as if any player who is an idol moves on.
It would be nice to see Rafa stand by his earlier ethics about his love for the club and fans and city and stay on to try and finish a job he set out to do and have the chance to be come a true idol of the fans and potentially end up with his own statue...because one thing's for sure, he'll have to pull up trees by the forest load to get the approval and ongoing approval of Arsenal fans...especially if he starts off as negative as he did with us.