Ruh-roh.
The blogosphere is full of claims that Adrian Newey has quit Red Bull, and the mainstream F1 press is running with it.
Most are leaving themselves wiggle room but Auto Motor und Sport comes closest (according to my high school German) to stating as fact that Newey has quit.
https://www.auto-motor-und-sport.de/formel-1/f1-adrian-newey-red-bull-abgang-ferrari/
Red Bull officially is saying they’re unaware of him joining another team, which isn’t the same as denying that he’s quit.
Newey to leave Red Bull over Horner allegations
“...Red Bull design chief Adrian Newey is to leave the team in the wake of the controversy involving allegations about team principal Christian Horner....”
https://www.bbc.co.uk/sport/articles/cmm3v9ny78eo
He’s got to know he’s very likely walking away from the most complete definition of success he’ll ever know.
And I give him credit for being bright enough not to want his legacy tied to Hambone’s success at Ferrari, so I am skeptical of the rumor that he’s going to the Scuderia.