More surprising is that Picard is also joined by some familiar faces on his travels, including former Borg agents Seven of Nine (Jeri Ryan, from Star Trek: Voyager) and Hugh (Jonathan Del Arco, from three episodes of The Next Generation), and an android played by the redoubtable Brent Spiner. It appears that this android is B-4, the prototype android for Lt. Commander Data. Data's destruction in Nemesis is mentioned as another motivating factor for Picard's mission and the presumed decision to resurrect B-4 for this mission.
It has also been confirmed that Jonathan Frakes and Marina Sirtis will also be reprising their roles as Riker and Troi from Star Trek: The Next Generation for the series, although it is unclear how extensive their roles will be.
Near the end of the episode it is also confirmed who the real big bad of the series will be: the Borg! A Borg cube is shown either being constructed or rebuilt, and the Borg threat is presumably what calls Picard (who has a long-standing grudge against them), Hugh and Seven into the fight.
Star Trek: Picard will debut on CBS All Access in the United States and Amazon Prime in the rest of the world in early 2020.