https://www.avclub.com/roseanne-answers-the-question-didnt-dan-die-in-the-1823505505

The fate of Dan Conner -- with a "horrifying" sleep apnea mask (https://slate.com/culture/2018/03/the-new-roseanne-trailer-has-familiar-faces-familiar-places-and-a-horrifying-sleep-apnea-mask.html) -- was revealed in a trailer during the Oscars.

I'm surprised they revealed this this early! Hopefully there's more than just this because we should get an explanation.