If you like me you have read the Edgar Rice Boroughs books three times through you will instantly spot lots of differences. Nothing killing in the preview, but enough to show that they couldn't get the licence from his estate, so had to make changes.
Still it is a well done preview, and makes you want to see more. Very good art, and I agree the Savage Worlds would be the system to go on this rather than the d20.
[5 of 5 Stars!]