https://screenrant.com/conners-season-5-jane-curtin-dan-louise-marriage-roseanne-plothole/

Dan's mother-in-law might be played by a comedy legend in The Conners season 5, but her arrival creates a major plot hole for the Roseanne spin-off.

OK........

Considering Curtain is 75 and Segal is 68, will the Curtain character be 90 in this?

I was an elementary child during the original SNL. (My parents let me stay up until midnight every Saturday night to see it). Jane Curtain seemed so old to me, probably because of her voice and her act. Now I look back since I am now 20 years older than she was then and go, damn, that was a nice looking woman.