The motivation to rehab and return will heal Jim.
I don't think he's up to retiring and rehabbing at the same time. Gotta keep the mojo up if you know what I mean. It's not the right kind of closure.
The team could start the season with an acting HC but I doubt Jim retires without a few more games under his belt.
Sadly, the NBA/transfer thing may be telling this year. 2012-13 could be a transition year.
Then again it is 2012. Beware of the solstice period between 12/12/12 and 12/21/12 . We may need an ark