Ignore the AI slop in the other reply. This is in every way but nominally a reboot of ER. Like, it's the same people making it, and it was intended as a reboot. Literally the only reason they didn't make it explicitly a reboot of the show is because they couldn't get Crichton's widow to sign off on it.
To quote an actual article:
Sherri filed her motion in August 2024 - one month after The Pitt began filming in July 2024 and before the series premiered on HBO Max. In the complaint, she alleged that creators Wells and Wyle initially pursued an ER reboot and, after failing to secure her approval, rebranded the project as The Pitt.
She described the show as an ER revival "just under a different name" and called the maneuver "a shameful betrayal of [Michael] Crichton and his legacy."
At the heart of the case is a "frozen rights" provision in Michael's contract with Warner Bros. Television, which barred the studio from producing ER spinoffs or reboots without his approval. (Michael died in 2008, leaving Sherri to attempt to enforce the provision on behalf of his estate.)
Personally I'm against copyright so morally I think Sherri Crichton is in the wrong, but legally I think she has some solid legs to stand on here