On a related note, I still think that a Pepperland step would be great (probably set after the events of the movie). Firstly, because we could have some fun with Doug and limit his repitoire to Beatles songs. Secondly, if they never had Yellow Submarine in his world, it would be great seeing him work out the unusual rules of the world (e.g. the Sea of Time, the Sea of Holes). And thirdly, because for once he would not be the only person around that can create magical effects with music; it works for everyone basically.
(imagines the skies filled with the Dreadful Flying Glove Aero Corps)
(imagines the skies filled with the Dreadful Flying Glove Aero Corps)