I don't see any similarity between this and the McDonalds lawsuit. Even though the Star Wars DVD set doesn't say which versions are included it is still false advertising in my book. Back when McDonalds was sued, they never made a claim that their burgers were low calorie. This Star Wars DVD set says "Original Trilogy" right on the package. It doesn't say anything about changed footage anywhere. That is what I am getting it. Most other releases where changes have been made say something like, "Director's Cut",
"Extended Version", "Unrated Version", etc. Star Wars does not. At least all of the releases for the Special Editions said so on the packaging.

I'm not saying a lawsuit like this could win. However, if there was enough support, Lucas may be forced to recall these sets and put some kind of stickers on the packaging saying these are updated versions of the films. That is all I am saying.

Patrick