I read several articles stating that very thing so ain't over until the players are either signed or not signed and Rob says so.
It honestly wouldn't surprise me to see the Lakers go into the season with Westbrook to see if he can get the deal he wants for either one or both.
Right now, the Lakers are the only team interested in Kyrie and I don't recall seeing a bunch of other teams lining up for Hield/Turner either.
Of course, the risk is...that could change during the season if another team has a key injury and decides to make an offer. It wouldn't take much to beat the Lakers best possible offer.