Max and Chuck Lorre are creating a new series set in 'The Big Bang Theory' universe. It might feature some original characters as guests.
cbs: 'The Big Bang Theory' sets finale episode for May 16, putting an end to 12-season run - The Economic Times
New Big Bang Theory Spinoff Plot, Cast on HBO Max — Who's Possibly Returning? – TVLine
New Big Bang Theory Spinoff Update Is More Exciting Than Initial Announcement (Due To Young Sheldon)
New show set in 'The Big Bang Theory' world in development at Max
New Big Bang Theory Spinoff Update Is More Exciting Than Initial Announcement (Due To Young Sheldon)
What is the Big Bang Theory?
New show set in 'The Big Bang Theory' world in development at Max
Why The Big Bang Theory Ended After Season 12 (Was It Canceled?)
A New Big Bang Theory Project Is In Development at HBO Max
The Big Bang Theory' Spinoff In Works At Max From Chuck Lorre
Ask Ethan: Did The Universe Have Zero Entropy At The Big Bang?
Jim Parsons Takes the Romantic Lead - The New York Times
The Big Bang Theory: Season 9
Big Freeze, Big Rip or Big Crunch: how will the Universe end?
The Big Bang Theory - Wikipedia