You know I would like it better as well if the next movie was a totally origainal.
I have to say, Gozo shouldn't be Jafer, they should make a new Muppet for the villian of Jafer. I think rather, than Abu like character, Gonzo should be Kermit's (as Aladdin) best friend. Also it would be cool to see the Muppet Treasure Island pirate Muppets as the Jafer's goons.
However I have to say, not trying to sound rude, I don't really like the idea anyway.