https://youtu.be/oz--6tGukuw?si=vx7K7orlIFucsfnh
Roz and Daphne will make some appearances and Lilith is slated to return as well.. The other cast members are tied down to their respective shows, but will probably make a cameo at some point.
John Mahoney who played Martin Crane has passed away since the original series ended, so he is out. Some people think that it will not work without the usual main cast, but I think that Frasier is perfect capable of carrying a series dolo without the others.