There are several videos on the DVD/Blu-Ray of ‘Iron Man’, that talks about the evolution of the Iron Man character over a period of time. It’s interesting to see the amount of thought that goes into making of comics and even more interesting is the longevity of the characters and their transition to the big screen.

Here’s a video off Youtube.

Tailpiece: One of the main reasons people still buy physical media (apart from quality difference, which is shrinking day by day), is the making and behind the scenes video.