It may only be a “Saturday Night Live” parody, but can we please make “Grouch” happen?

Guest host David Harbour starred as “Sesame Street” curmudgeon Oscar in the parody of Todd Phillips’ “Joker” — or, as the voiceover said, “From the studio that brought you ‘Joker’ and the twisted minds at Sesame Workshop comes the next gritty antihero origin story.”

In the fake trailer for “Grouch,” we first see Oscar picking up trash bags with Grover (Chris Redd) while in a typically foul mood. Soon he’s donning green face makeup, aiming a pistol at the camera and crawling into his distinctive trash can. “If everyone calls you trash, if everyone treats you like trash, why don’t you just become trash?” he says.

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The clip also features a host of familiar “Sesame Street” characters in gritty, hyper-realistic fashion:...