Just think of all the ways you could combine Zelda, Secret/Trials of Mana, Chrono Trigger & LotR!
Why you could combine them with specific WoW Zones like Maldraxxus, Bastion, Ardenweald, Val’Sharah, Suramar, Deepholm, Sholazar Basin, Jade Forest and Eversong Woods.
You can even go for Cartoons if you so desired!
Imagine a series of Cartoons that used each of Mount Celestia’s Infinitely Vast Layers(one for each Cartoon), each of the Beastlands’ Infinitely Vast Layers(one for each Cartoon), Arborea’s Arvandor Layer and a MLP Cartoon in Carceri/Tartarus’s 6 Universes containing Infinitely extending Strings of Planets!
As for the appearance of the Layers:
Celestia:
- Lunia’s Central Island is Middle Eastern with Pyramids and Arabian Nights stuff everywhere while the other 2 Major Islands are a Kingdom of Holy Rats(I.E. Redwall Mice) and a Land Before Time-esque land
- Mercuria is India and Japan combined into one with Golden Light shining upon it at all times
- Venya is the Shire
- Solania is a Mountainous Realm holding both Chinese and Dwarven Cultures
- Mertion is a Desert with the architectural Styles not even mentioned
- Jovar is an Angelic City inside an infinitely vast giant jeweled stone fortress
Beastlands:
- The Happy Hunting Grounds which has Lion King-esque Savanna, Fox and the Hound-style Woods and Sholazar Basin-style Dinosaur Realms all of which have Talking Animals with the goal of teaching any would-be Hunters the true thrill of the Hunt
- The Sunset ripoff of Grizzly Hills(complete with talking Bearmen) with talking Weretigers also present
- Narnia under eternal Starlight
Arborea:
- Olympus
- Arvandor the Elven Realm(should combine Val’Sharah with Kokiri Forest, Suramar, Mirkwood and Eversong Woods)
- Court of Stars(Ardenweald)
- Aquallor the Realm of both Poseidon and the Sea Elves
- Mithardir the Egyptian Desert with Sand Elves and Mummies
Tartarus(for MLP):
- Othrys is a string of Planets with Stormy Red Skies(with Red Lightning) containing Stony Mountains amidst a Maldraxxus-esque Swamp with Glowing Green Water
- Cathrys is a string of Planets containing Red Jungles and razor sharp Red Grasslands
- Minethys is a string of Planets containing Red Powdered Blood Deserts with Egyptian Architecture everywhere
- Colothys is a string of Spikey Planets filled with Red(you probably are starting to notice that each of these Layers in Tartarus have something Red dominating it) Canyons
- Porphatys is a string if Snowy Planets with one half being under an infinite Acid Blood Blizzard(creating Seas of Acid Blood with Acid Blood Ice & Snow) and the other half under an Infinite Black Vinegar Blizzard(creating Seas of Black Vinegar and Black Vinegar Ice & Snow on the Planets)
- Agathys is a string of Planets each filled with Dark Ice with Glowing Red Streaks with the one on the Planet corresponding with the entry Planet into Tartarus having an Undead-filled Necropolis ruled by the Grim Reaper