In the world of comic book art, stealing other artists' ideas is a BIG no-no. Google "swipe file", especially on Bleeding Cool.
We had a horrible mess for a long time with a monster named Rob Granito, who stole everything he drew and made lots of money on other people's ideas and compositions.
But back to the original intent of the thread...
One of the most important skills that can add to the "it" factor is the ability to invent original compostions and poses using the traditional characters.
Check out my sketch card blog: