Piggy could probably play Yoda.
Beaker and Bunson could be R2D2 and C3CPO
Rowlf would be typecast as chewy
Kermit McDermit is clearly the emperor and he's got Darth Scooter as his apprentice
Han Gonzo and Princess Camilla
Swedish Chef is the deathstar operator that spends 10 minutes pulling levers and pushing buttons and eventually just shoots Alderan with his pistol
Sprinkle some A-list humans in there that inexplicably crush their role like this is still a serious movie