AtomicPope
Hero
Part of the problem with WotC releasing settings which are not classic is the licensing. It's difficult to take someone else's IP, give it your own spin, and sell it to both the creator of that IP (or their estate), the existing audience, and a new audience. That's why WotC is content with releasing MtG as a campaign setting. They get to cut out the IP part and just treat it as product release to draw in new players from a different market. Having said that, I'd like to see some classic fantasy or scifi from decades ago, not mentioned, turned into campaign settings.
Movies:
Dark Crystal - a completely different setting as it doesn't have any of the standard races. The Skeksis are like the Nagpa in 5e.
Krull - could easily be a Spelljammer setting
The Beastmaster - swords and sorcery still has its place
Treasure Planet - the style and aesthetics of an Eberron Spelljammer
Books:
Fred Saberhagen's Empire of the East and The Book of Lost Swords series: it's like Gamma World meets DnD, swords, sorcery, and ancient high tech wonders.
Princess of Mars - Steampunk Spelljammer full of monsters, alien empires, and strange places.
Movies:
Dark Crystal - a completely different setting as it doesn't have any of the standard races. The Skeksis are like the Nagpa in 5e.
Krull - could easily be a Spelljammer setting
The Beastmaster - swords and sorcery still has its place
Treasure Planet - the style and aesthetics of an Eberron Spelljammer
Books:
Fred Saberhagen's Empire of the East and The Book of Lost Swords series: it's like Gamma World meets DnD, swords, sorcery, and ancient high tech wonders.
Princess of Mars - Steampunk Spelljammer full of monsters, alien empires, and strange places.