If salary mattered, Newey would be going to Aston Martin as it has been said ARAMCO is willing to pay him whatever he wants and they can comfortably out-bid any other team on the grid.
The Race believes that Red Bull will re-sign Perez soon because he is the "safe" choice having already been fully integrated into the team and he will not cause any issues with Max. If true, I presume that means Sainz will sign with Audi and drive for Stake next year (god help him considering how crap they are now). Toto seems to be holding out for Max possibly bailing from Red Bull and therefore are not said to be interested in Sainz as he is demanding a two-year contract with options.
Personally, I think if Sainz does sign with Stake/Audi, we could very well see Bottas back in the Mercedes for next year or two with Kimi replacing Logan at Williams to have a year or two to get acclimated without the pressure of being a driver in Mercedes' works team. Bottas will be out of a drive if Sainz joins (since Hulk is almost certainly replacing Zhou) so why not park at Mercedes for a year or two and then either hope for an open seat or move on?
Also according to The Race, Jos is on the warpath again, complaining that Red Bull is not doing enough to fix their issue with ride height on bumpy tracks. The RB20 has to run as low as possible for the maximum benefit from the ground effects and when they have to raise the height - like at Monaco - it really hurts the car's performance. Canada could be another track that catches them out on this and, of course, there is Singapore where they floundered pretty hard last year.