Thread Revival!
These may have already been said but:
What if Cookie Monster still had teeth?
What if the Swedish Chef was French?
What if Sam was a weirdo?
What if Beaker never got hurt in the Muppet Labs sketches?
What if Boober was as daring as Sidebottom?
What if Rowlf the Dog never appeared after the Jimmy Dean Show?
What if Big Bird wasn't big?
What if Lips, Marvin Suggs, and Marvin's Muppaphone did an album together and they'd call it, "Marvin and Lips Unplugged"?