IMO, it's unfortunate to see how OKC is falling as a franchise. They are one of my favorite teams and have had so much talent over the years but have come close, but fallen short of winning two championships. If they do trade Russell Westbrook,
I hope he's traded somewhere where the team is still competitive and will make the playoffs. I've heard some interesting rumors/reports about teams that could trade for him, to include the Pistsons, T-Wolves and even the Rockets. (Though, that it reported to be more of a long shot)
Somewhere like the Pistons could be interesting. If he were paired with Blake Griffin I think (if they stayed healthy) they get the Pistons back to the playoffs and maybe a better seed than they had this year (which was 8th.) Maybe with a bit of push they could at least make the 2nd round, which is more than OKC has done since KD left. I think I even saw a trade scenario where they would be able to keep Andre Drummond as well. If so, a trio of Russ, Blake and Andre could at least be competitive in the East.
I've also seen some other suggestions/potential trade destinations mentioned as well. Russell is one of my favorite players so I hope he ends up in a place where he can at least compete.