I would be surprised if Ventura hung it up after this season. I just can't see him leaving after the poor performance of the Sox in 2013. His contract runs through 2014, so I assume he'll be back for one more year and try to make amends for what has happened record-wise this year.
After Ventura? I have no clue. I just hope it's someone who works well with the young players we'll have on the roster at that time.