Well, there are several reasons for this. Many of them are outlined in Micah's excellent site Doc Savage: The Animated Adventures.
But what I was wanted to see was what Doc and his crew might look like as seen on an animated show. There were a few attempts here and there, but I wanted to see more, so I did them myself. The character drawings are based on the same style prevalent in the Batman and Superman animated adventures (although I hope not too much).
It's just a glimpse of something that looks, at this time anyway, to be a vain hope.