...What happens? Does he retire quietly as promised? (1) Run for office? (2) Could he be put in charge in Korea after MacArthur or help reunite Germany and alter the trajectory of a nascent Western Germany? (3)
(1) He'll have no choice to either resign or be involuntarily separated as President Truman didn't think highly of him. He was 60 at the time of his death so it is unlikely he would be allowed to serve another 5 years until the Korean War starts.
(2) Extremely unlikely with his inability to censor himself, his eccentric beliefs on reincarnation, and after his statements after WWII that led to his 15th Army dead end assignment.
(3) No chance for either.
I think a Korean War with Patton could lead to a United Korean pensinsula which could turn the Cold War on it’s head
He was shunted off to an administrative army command before his death. There's zero chance for General Patton to get another field command under Truman.