Like I said in a previous thread, there are rumors of Terry wanting a 'Next Next Generation' series set in the 25th century. Whether Paramount goes for it is TBD.
I would assume Jack Crusher is our spinoff character to lead it. Pic S3 is basically a launching pad for him.
They could set the series a decade or so after the events of Picard S3, where Speelers is playing a Jack Crusher in his mid-30s, to line up with the actor's age. Potentially a Starfleet officer by then.
The 25th Century just has so much untapped story potential to be mined. The groundwork set up by 90s Trek is really rich to launch new stories from.
I read that Terry currently does not involve in any Star Trek project.