Those are great cover Ideas theprawncracker and crazed gonzo fa, spoken true Muppet fans, but sense Disney has to put then back into the spot light, logically, they have to put what sells, and right now, Miss Piggy is what sells, and I as a fan have to agree on their choice.
I would rather them reach the biggest audience possible to increase the chance of future releases, them for them to sell only to a few hardcore Muppet fans. So they are doing something right, from a business standpoint!
That's my two cents.