Here is how I see the regular season rotation working out at the moment:
C Mahinmi - 22
PF Duncan - 32
SF Bowen - 28
SG Ginobili - 26
PG Parker - 32
C Thomas - 20
PF Oberto or Bonner - 18
SF Udoka - 22
SG Mason - 22
PG Hill - 16
That'd be a pretty sweet ten man rotation. It didn't strike me until I wrote it out but Udoka might play a pretty big role for the Spurs next year. If Bowen starts to slow down, he'll be first in line to get those minutes. On top of that, he's the small ball power forward at the moment. He could potential average 26 to 28 minutes depending on what happens.
Then again, if Finley is brought back and put into the rotation, he'd eat up some of those small forward minutes ... most likely.