An option would be a (action+) gothic horror story in Ravenloft for a public who needs to know nothing about the demiplane of the dread. Also it is a good place for supernatural romance, but now this is a old-fashion genre, isn't it?
* For an action-live movie they would need a really good story. I guess the best option would the best-seller books, Dragonlance and FR. Red Steel/Savage Coast is perfect for a "Pirates of the Caribbean Sea" but the key is a good story and charismatic characters. Birthright is perfect for a "Game of Thrones" but it would need a masterwork as script. And a idea could be about explaining what killing the evil lord is easier than after ruling the kingdom as a good leader and not as a toxic boss.
It is curious. Jakandor is perfect because they are only humans. Maybe it only needs a good story as "Romeo and Juliet".
* To try and test my suggestion is cartoon and CGI series. Spelljammer is perfect to sell toys of action-figures and vehicles. And I would add the "scarlet sphere", the closest one to the crimson sphere of Athas (Dark Sun), where some refugees escaped from the genocide cleansing wars.
Kara-tur is perfect for a manganime serie. Maybe WotC onlys needs to publish a SRD with oriental races and classes (ninja, sohei, samurai, martial adepts) and third parties would publish their own manganime setting.
* Other idea is a RPG liveplay show as Critical Role but a videogame engine. Public would listen actors' voices and would watch the characters as an asymmetric e-sport. Dark Sun could a source of inspiration to create skins for a videogame, for example Fortnite.
* With Capcom I would suggest a crossover videogame "Capcom vs d20", with the famous videogames characters (and from some forgotten title, for example Captain Comando or Battle Circuit) and from the tower of the doom and shadow over mystara, but also from d20 Future (Star*drive and Star frontiers) and Gamma World.
* An idea to tell a story would be about how the clerics want to control the mana source "to help the people" and the arcane spellcasters reject that control. A conflict between divine and arcane spellcasters because clerics say they want to protect you, but you have to obey their rules for your own good, and wizards and sorcerers are feared and envied by the masses because they have a superior power. They arcane spellcasters says their power is for talent and hard work and they don't want to use to hurt others, but many people don't believe nor trust them.
Other idea for a story is some gods create "favored souls", divine version of sorcerers (spontaneous spellcasters) and psionic ardents (as clerics but with psi-points) without control by the clerics (and this creates conflicts) to teach some (painful) lessons for the high-priests, noble houses and the masses: The good intentions isn't justification to want to control all. The best father isn't overprotective but teaches to fence to fend for himself. We can't avoid always the suffering but we have to learn to face it. The pleasure and fun are only ashes when you face suffering, old age and death, that doesn't mind but to have left a positive legacy, a better future for the future generations. The worst mistake is allowing others to decide for you when they don't worry about suffering the consequences if they are wrong. To stop evil we can't forget the respect of the human dignity or we will become fanatic monsters. We need the right balance between self-criticism and faith in oneself, both are necessary but too much may hurt you. Don't worry so much about to be the number one because you will not get true respect but the tallest poppy over the rest is the first they want to cut.