Gotta say, this feels like more than a coincidence.  It just seems way to random that Turner would be working out with GWill and TFall.  Still, could mean nothing.
One thing I noticed is that Grant Williams (6'-6", 230 lbs) looked really small against Turner (6'-11", 250 lbs).
If there is a trade, it likely does involve Hayward, who we may be losing anyway.  It could possibly be a sign and trade with Hayward signing for less but I don't know all the rules.  I think the question is more about Turner and what?  Oladipo?  Lamb?  I doubt we would be getting back Warren, Sabonis, or Brogdan.
I would be happy to get Turner at his current money.  He would bolster our big rotation significantly.  I would be thrilled to get Turner and Oladipo, and happy enough even if it was Turner and Lamb (again, it feels like Hayward is gone no matter what).