The 'Criterion Collection' release of 'Armageddon' was a surprise; I didn't think that they would offer a release of 'popcorn' movies like this one. Having said that, the release of it shows a good deal of extra material not seen on previous releases. A few minutes of additional footage is woven into the film here, mostly when Harry visited his elderly father (played by Laurence Tierney, I believe) and some additional footage with Harry & Dan Truman (Billy Bob Thornton) at the Johnson Space Center. Additionally, TV spots and a long list of trailers are available, as well as interviews with some of the cast & crew, including 'background' players such as Jessica Steen (NASA pilot Watts), William Fichtner (Col. Willie Sharp) and Marshall Teague (Col. Davis). Outtakes are also seen in places, and some interesting commentaries are included, such as those from NASA officials as well as scientists familiar with the very real threat asteroids such as this fictional one might pose. The 1 problem is the aspect ratio that it's presented in; it doesn't fit my widescreen HDTV. That's the only complaint I have which isn't really enough to undermine it.
This is worth picking up for any fan of the film!