Interesting question.
I think it really might have a whole lot less to do with Marbury's statistics and a whole lot to do with Marbury's attitude and whether Eddie House picks up his option and whether Danny gives up on Tony Allen(keeping my fingers crossed hoping and praying) or not.
If Marbury comes in and only shows flashes of what he can do because he has not played in a year but exhibits a great team attitude and a focus to playing defense, that's going to go a long way toward get on Danny and Doc's good side. Pulling a Randy Moss and showing that he can be all about team and winning will help to revitalize his career more than showing he can stick a jumper consistently.
Also, with a good attitude, if Eddie House decides to excercise his option and not return, Marbury becomes a perfect fit here in Boston. With Eddie staying then the need for Starbury dwindles considerably. Also, maybe Danny becomes sick and tired of the Tony Allen injuries and bonehead plays and finally ships him out of town. If that is the case, Marbury could once again get a good offer here.
But first, let's see if he can remain sane for a 3-4 month stretch before making any judgments on bringing him back. This could, afterall, blow uo right under our noses.