This is assuming the pick going to OKC is the #1 pick, I don't know which one off the top of my head that it is.
Wizards get Chet and Claxton for a great frontcourt, and Demin for a high-level backup PG. McCain pairs with him in the backup backcourt, and Coby White comes in on a three-year deal to fill the starting SG position.
The Thunder, of course get the #1 pick and rights to AJ Dybantsa, and what's crazy is that they are so deep that they can trade Chet AND AC and still have a starting lineup of SGA-Dybantsa-Dort-JDub-Hartenstein.
I feel like the Nets do this almost instantly, getting AD and AC while the biggest name they're giving away is Nic Claxton. Mann imo isn't a very good contract, and the Nets have a million different guards for Demin to compete with. Champagnie isn't terrible either.
All in all, however, I don't think that this is realistic, I don't think the Wizards pass up on getting AJ Dybantsa, and I don't know if the Thunder would want to do this either, Chet is a valuable piece and the core of the Spurs-Thunder rivalry, which ik doesn't matter but I just wanted to throw that in there.