Norman Reedus (Daryl) and Melissa McBride (Carol) will both have the option to appear in other AMC offshoots. Danai Gurira (Michonne) contract in process. The Hollywood Reporter, 5 NOV 2018.
Angela Kang revealed that former cast members Sonequa Martin-Green (Sasha) and Scott Wilson (Hershel) would make an appearance in Season 9. Jon Bernthal (Shane) is comin' back too.