You've mentioned Morris more than once. I'd be more than happy with him being added to the roster. I'd still like to see one more big man for insurance. So two players have to be added to a full roster.
I dunno. The more I look at this, the more I think they're just going to add their two rookies, axe Pondexter and Metu, give their second 2-way to Weatherspoon, and wait for the trade deadline to decide on any changes.
They have two young guys who missed the season with injuries - that probably limits their value right now. They have White on a cheap contract, and was in the discussion for Most Improved - hard to let go of him without seeing if he gets even better this year. They have Forbes who accounted for almost 22% of the Spurs' made 3-pointers, and who started taking advantage of his improved size/strength in the second half of the season. Pop isn't trading Mills, and no one wants his bloated contract.
So that leaves Belli and Bertans, who accounted for almost 40% of the Spurs' made 3-pointers last season. To add an insurance big and a wing, they would have to give up both of those guys just to clear the roster spots. So if they did that, whoever they added would have to shoot 3's at a pretty high rate, or the Spurs would be terribly underpowered from outside.
To me, unless they can find a buyer for DDR's contract, the most likely thing right now is for them to add the rookies and cut the two bench implants, and ride this roster until the trade deadline.