Agreed about Becky in the sequel. I've talked about how I believe "erasing" Andy from the canon does a disservice to Jackie.

Nancy appeared in the pre-Conners Season 10 of "Roseanne" (in Spring of 2018 before Roseanne Barr got fired). I have no idea why Nancy and Bev haven't shown up on "The Conners" yet.

Kathy coming back would be a hoot! Is Megan Fay even acting, anymore. They should definitely have Todd come back to visit D.J.

Not sure where Martin Mull is, as Leon.

I seriously doubt they could get Clooney back to reprise Booker.