This is one playset Hasbro should consider doing. A larger, more realistic, more detailed and movie accurate version. Hopefully 2 to 3 times as big as the old one, with plenty of floor space and a larger stair/walkway section where the beginning of the duel takes place. Lights would be cool because they enhance the atmosphere, but are optional. Sounds from Empire would be nice too "He's alive, and in perfect hybernation".
Obviously you can do a lot with the freezing process, such as sound fx when Han lowers into the chamber. And have a Han-in-carbonite block be pulled up afterwards by the mechanical claw, like the film (anyone remember the micro world version of this?). There's a lot you could do with it, but I think it would be a good seller. In what price range? 70-80$? It is from a memorable part of Star Wars, has plenty of action features similar to the bmf, and can utilize a dozen or more figures- which would sell more figs.
What other features would you want? What figures packed with it? Could they have a two part playset here... the first part is the freezing chamber, the second is the tunnel and hallway below where Luke searches for Vader, then gets sucked out the window. Here are pics of 2 great dioramas to ponder.