There seriously most likely won't be a box set for the four movies. There really is no "fourth movie" as you guys are saying. Wolverine is a spin-off in a different direction with a different cast, a different director, and different writers. It's not part of the trilogy any more than "Magneto" will be or "X-Men: First Class" will be.
It's branded as "X-Men: Origins" it most certainly is rated to the 1st 3 movies and thus, I believe, will be re-released into a 4 movie set (perhaps before this Christmas) after this Wolverine one comes to DVD/Blu- a few months from now. I agree w/ S. Alqassar , they most likely will release wolverine by itself and then a few months later release a "complete" set. Again, my advice for fans would be to sit tight and wait. This is definitely the type of popular movie set the movie studio loves to double dip.
no they won't because it is not part of the x men trilogy. it is a spin off film. there will be other films included in the x men origins series also. maybe one day they'll get the box set treatment, but it's a safe bet that the wolverine film will not be included with these 3 movies.
you know the 5th movie is coming. It's money making...it's not like harry potter... they can keep making it until it flops. Then again they still re-make bat-man after a few flops...so it will be never-ending sequels. why even buy box set..other than that it's cheaper than buying one by one.