Once the stink of John Carter has wafted away, Edgar Rice Burroughs’ Barsoom series.
The Fairy’s Mistake by Gail Carson Levine. It’s a new, very funny version of an old fairy tale called “Diamonds and Toads.”
Back in 1936 (two years before Disney’s Snow White was released!) animator Bob Clampett suggested doing John Carter of Mars as an animated feature. He eventually turned out some footage, some of which still exists:
This pre-dates the first commercial feature-length movies, and pre-dates the character of Superman (not to mention the Fleischer Studios animation of him). Pretty far-ahead vision Clampett had. Too bad he wasn’t able to get it “sold”.
By the way, lots of us think that the Disney John Carter didn’t stink, and certainly didn’t deserve the bad press it received.
Mainstream appeal was not one of the criteria in the OP.
I saw what you did there.
While you’re at it, let’s do all of the classic fantasy authors: Moorcock, Zelazny, Leiber, Dunsany, Eddison, etc.
I’d give a Doc Savage series a try…
I never thought of that, but you are right. I’d be afraid of Tom Cruise getting the part in a live-action film.
For that, we need a big-budget adaptation of The Dream-Quest of Unknown Kadath. With The White Ship as a short film preceding it.
Phil Foglio did a couple of comic books/graphic novels of the first Myth book (Another Fine Myth), and you can read them online for free. I have the original dead tree version somewhere.
Also, let’s limit the Destroyer stories to just the ones by Sapir and Murphy. The writers who took over really didn’t understand the series, IMO.
I’ve often thought that the Thursday Next series would be fun to watch. It’s pretty much a cartoon in my head, anyways. (I just can’t imagine a real person acting like Thursday, especially at her age.)
Another good choice would be Copper, by Rebecca Lisle. It’s a children’s fantasy novel.