Well according to Mike Quinn a Muppeter who is on the inside. He said and I quote: "The thing is, Disney know that fans want these seasons and they want to release them. It comes down to music rights and the cost. I'm not sure how many units they would have to sell to break into profit but I'm sure someone did the math. I suspect the declining sales from the last season or two is what halted them.
If I make enough millions, I could pay for those rights and we could all have our 5 seasons to watch."
So I don't know I mean if you go by that then we would still need to go to Disney, and show them that yes they would be able to make a profit if they spent the money on releasing the final two seasons.