They didn't even have to produce new footage for extras. There was tons of stuff released by Marvel in the lead up to the movie from set interviews to B-Roll footage. They couldn't even be bothered to toss in trailers or ads. Also, there are more extras out there produced for DVD tie-ins. Target has a Making Of extra no one can seem to download and there were two featurettes on the Japan DVD that are making the rounds - one on the making of the elevator fight and the other on special effects. All of this could have been on the DVD/Blu-Ray. It's not as if this was also rushed onto home video - the movie came out 5 months ago - they had plenty of time to put together a more substantive package but they just didn't care to or think it would make a difference in sales. There's also absolutely no reason all these extras couldn't be on the DVD version - there's plenty of room - especially for an audio commentary. Studios bemoan declining DVD and Blu-Ray sales in the face of Digital Media, cheap RedBox rentals, and even piracy but they do very little to make buying the DVD or Blu-Ray worthwhile for the every day consumer. Regardless, the movie is awesome and doesn't need extras to make it a worthwhile purchase and I bought the Best Buy Steel Book even though it's just better packaging for the same content for more money. So they pretty much own me.