The ending was, they won the lottery in the final season, but that at the end the whole series was revealed to be the Roseanne character writing fan fiction about her family or something, in “reality” Dan had died of heart attack, the sister was a dyke instead of the mother, and the daughters actually each married each other’s husband and Roseanne though there were bad matches.
Goodman is in it so I assume they are retconning that bizarreness.
I saw a little of the final season a few years ago, fans say online that having them win the lottery ruined the show.
I stopped watching the show a few seasons before the end. The Becky rotation thing was enough to make your head explode. Average original Becky and then hot Canadian Becky and back again.