HebburnMackem
Striker
It's based on more than just that interview, but that did indeed kick the speculation off.It's just speculation based on this interview...
It'll be a 1-episode cameo at best. He's very old now. It's been 25 years since he did Picard and he is pushing 80. I'd love to see the TNG cast get a cameo in STD but that's all it'll be.
Since then there been slightly more concrete connections to him and Trek:
his: Alex Kurtzman Inks $25M Overall Deal Extension With CBS TV Studios, Will Expand 'Star Trek' TV Franchise
"The new deal comes as rumblings about another Star Trek series, featuring Patrick Stewart reprising his role as Star Trek: The Next Generation's Capt. Jean-Luc Picard, have been getting louder. Sources say Kurtzman and Akiva Goldsman, who left Discovery after season one, are attached to the Stewart-led reboot. CBS TV Studios declined to confirm the Stewart project as sources say a deal is far from completed and may not happen, despite the fact that the actor recently teased his potential return to the franchise."
There's no reason why he can't do a mini-series or be a part-time guest (like Guinan). As I said just last year he was a regular in a weekly TV-series in the US.