Pitch: a muppet movie where the muppets play D&D, and it cuts between the muppets around the table and the fantasy being acted out, but instead of it just being the muppets dressed up in D&D fantasy costume, it's celebrity actors but the muppets do the voices, and the actors have to act how those muppets would. Imagine a barbarian played by Jason Mamoa voiced by Miss Piggy.