KG will be next year's center.
There's probably a 50/50 chance that Brandon Bass comes back (his play this postseason is likely putting a damper on demand for his services in free agency; we're seeing his limitations on full display). I'm alright with BB returning, as long as it's for a bench role.
Pretty decent chance that JJJ cracks the rotation, although perhaps more as a 'tweener 3/4. Doubt he'll be a starter, but I would hope he can carve out a bench role for himself.
Stiemer will return, for a bench role.
Dobutful about Hollins, as with BB we're seeing that the scouting report was pretty accurate. He can help on occassion, he's really athletic but a lot of his athleticism seems to be wasted; he's just not a particularly good player. He's all over the place, yet can't score or grab a rebound.
Sean Williams; camp invite, long shot to make the roster.
Chris Wilcox; let's hope he can come back, just because that'll mean the docs have given him a clean bill of health. Any contributions he gives will just be bonus.
I believe there's a pretty good chance that most of this year's frontcourt returns next season, but I really hope that doesn't mean that we aren't active in pursuing another quality big man. If KG remains at the 5, there isn't really another player there that I'd be comfortable with as the starting 4. Lots of guys who, either because of their youth or their limitations, you would really prefer to see in a bench role. But, I'd guess that most of these guys will return.