First, let me give you some Big Bang Background.
Chuck Lorre wrote 12 episodes of Roseanne in 1990–1992. He is now the head writer of Big Bang Theory.
Johnny Galecki played David on Roseanne. He now plays Leonard on Big Bang Theory.
Sara Gilbert and Laurie Metcalf both had major roles on Roseanne, and now are in supporting roles on Big Bang.
So, what’s ahead?
I am pretty sure that when Howard’s mother is revealed, she will be played by Roseanne, unless that character is purposely a caricature of Roseanne Barr. I understand she can be demanding and harsh.
That said, when the TV Series Roseanne jumped the shark, it was when she won the lottery. The rest of the series sucked.
Sheldon and Amy having sex might be fun for several episodes, but it might be their jump the shark moment. I envision Sheldon being horrified that he likes it, and he finds himself conflicted over doing it again, or quitting his job and doing it all day.
Howard and Bernadette spoke of having children last night. That is a possibility, or they many just anguish at their inability to have a child.
Leonard’s and Penny’s upcoming nuptials will be derailed. The only humor in them getting married would be Sheldon trying to find a new roommate, which of course Amy would want to be.