Lee, Johnson, Jerebko, Turner, and Zeller are all expendable/replaceable in my opinion. I think the Rookies we draft will be better than most of these guys or at least have more value and promise. Sully I would want to keep if he doesn't get to expensive. We are going to need up to 4 or 5 roster spots just for our draft picks (we can't stash all of them). They will probably pick up Johnson so that means the other 4 (Lee, Jerebko, Turner, and Zeller) are very likely gone, and maybe all 5.
The under contract group, Bradley, Thomas, Crowder, Smart, Olynyk, Rozier, Young, Mikey, and Hunter are all keepers assuming they don't get "consolidated" through a trade.