Spoilers Tng Crew in Picard. Speculation of what they are up to.

[Xhiandra]

I think some fit, but some do not. For instance, Worf should probably be helping Martok in the Klingon Empire, so unless the heroes have to go ask the Klingons for help, I don't see much reason to bring him on, much as I like Worf.

Beverly Picard, though, I think should appear.