These are the last factions I thought would fit into the kind of world that held all these factions. I hope that someone takes the challenge. Again good luck and Happy Easter.
Possible Factions
Agrabah-Built along the famed silk road and near an oasis, Agrabah has been a major kingdom of the desert factions. Known for mystery and magic as well as spice, they hold few rivals in the sand sea. Through the sultan's leadership they continue to grow, and thanks to his daughter's marriage to the "street rat", now prince, Aladdin they have a far better understanding of the lower class. This gives Agrabah a bonus to public order and a plus thirty income from trade. They are immune to desert attrition. They have superior light infantry and cavalry, and have magic carpet riders and battle genies.
Ogre Confederacy (Shrek's faction)-Looked at by the wider world with fear and suspicion, ogres have struggled to make a life for themselves away from many human settlements. Most ogres are marauding beast intent on plunder and fights, but there are those that want nothing to do with this stereotype and have banded together to protect themselves and make a peaceful existence. Under the leadership of Shrek and his wife Fiona, this confederacy seeks to keep their people safe no matter the cost. The Ogre Confederacy stays as a migrating horde and doesn't settle, but gains big diplomatic favor for dealing with monster hordes within another faction's territory. They are immune to forest/swamp attrition. All units are far more durable than other factions' units due to them being ogres, and they have access to stank catapults and giants.
Transylvania (Hotel Transylvania)-The House of Dracula has ruled the lands of Transylvania for millennia going back to the time the first Lord Dracula accepted vampirism. The present Count Dracula has made Transylvania a haven for more sensible monsters and non-humans to live alongside more accepting humans that live in the territory. Count Dracula more so due to his daughter Mavis' marriage to the human adventurer Jonathan and their son Dennis. However, with corruption and more greedy kingdoms growing in strength, the count is willing to do whatever it takes to protect his family and friends. Transylvania has access to necromancy magic to bolster their forces with skeletons and zombies that require no upkeep. Lands around Transylvania's settlements have a monstrous forest that causes attrition to enemy and neutral armies that pass through them. They have a roster of low to mid-tier human units and a large assortment of monster forces that have a large range of abilities and bonuses, such as werewolf warriors and hydra.
Valley of Peace (Po's faction)-There is more a person can do when they've trained their bodies to become weapons, and none know this better than the people of the Valley of Peace. While being a vassal state to Great China, they are renown for being the birthplace of kung fu. Most of Great China's non-human residents live within the four settlements that make up the valley's province, giving them advantages over normal humans. Master Shifu, the Furious Five, and the Dragon Warrior Po have defended the citizens of the valley for years but must protect them against the coming darkness. The people of the valley have no desire to conquer and are thus confined to only the settlements within the valley but can set up more buildings in their settlements. Their main goal is to be allies to all factions, not evil, to bring an age of peace. The Five are champions while Po can lead an army. Their long and mostly peaceful existence gives them a plus forty public order and plus thirty food. They specialize in champions and chi users but all units gain experience at a much fast rate than other factions, and have access to kung fu masters and firework cannons.
Great China-Starting with the largest amount of territory initially, Great China is immediately under attack by the Huns once more. Yet the citizens know that their emperor and their people will do everything in their power to protect their nation as a matter of honor. Seemingly endless volunteers and drafted can be called upon for the sake of China. Ancient guardians keep vigil over the country to promote good fortune to the folk living near them. With the emperor's wisdom and leaders like Fa Mulan and Li Shang Great China's power and prestige will last for another few centuries. Through their ties with the Valley of Peace, they have knowledge of chi and its properties of healing and power. China's supplementary resource is honor which allows the recruitment of more high tier units and buildings. Honor can be gained with diplomacy and more is gained if they maintain goo diplomatic relations with the same faction over long periods of time. It can also be gained through heroic victories, close defeats, or coming to an ally's aid if that ally goes to war. Honor can be lost with bad diplomatic choices, such as not coming to an ally's call, pyrrhic victories, defeats, or raiding settlements. Honor gains slowly but can be lost quickly. China specializes in pikes, bows, and light cavalry their units also replenish faster than other factions, but will be reduced if they lose several consecutive battles. They have access to cannons and zodiac guardians.
Pride Rock-Ruling from the majestic natural feature, the lion kings of Pride Rock have governed the great grasslands for over six hundred years. Known to be strong and uncompromising, they established order on the chaotic savanna. Now this venerable dynasty is under threat from infighting and treachery. Only the crowned prince Simba and those loyal to his banner can hope to retake the ancient mountain from his traitor uncle Scar. With diplomatic and financial support of the Gorilla clans Simba hopes to reclaim his rightful home. Pride Rock does not start within the rock itself but forced to a settlement within the oasis that Timon and Pumba call home, and must rebuild their strength before retaking the whole five settlement region. They are also military allies with the Gorilla Clans. When Pride Rock is reclaimed, they receive a massive public order bonus to themselves and any allies. They specialize in infantry and a few war beasts such as war elephants, but have a severe lack in cavalry. They have access to lioness kingsguard and primal spirits beasts.
Gorilla Clans (Tarzan's faction)-Comprised of many families within the great central jungle but allied to safeguard their ancient home. The great chief Kurchak brought stability to the great wilds, but was murdered by human extremists and the title for great chief falls to his foster son Tarzan. However human Tarzan is changes little in the eyes of the jungle and many non-humans are comforted in his rule. While warry of the new interactions they have with human traders, they can't deny the new developments have in many ways improved their less than advanced lives. Having the scientist wife in Jane Porter and her father increases the research rate of the clans. The clans also have knowledge of the legendary land of Pelusidar and its dinosaurs hidden there. They can only occupy settlements within heavily jungle or forest and are immune to jungle, forest, and swamp attrition. The Gorilla Clans have superior heavy infantry, great weapons, skirmishers, and war beasts. They have access to rhino riders and titan dinosaurs.
Atlantis-At the height of its power, the empire of Atlantis covered the whole world and taught many things to the early peoples. They had mighty structures and creations that first harnessed early magics. However, when the infamous dark wizard Pitch Black brought the darkness and his army they were the first to fight back and fall. The king of Atlantis desperately used and untested weapon of potent magical power and destroyed a large portion of Pitch's army, weakening him enough for the first Guardians to rally the other peoples of the world against him. Unfortunately, the force of the weapon's blast caused a massive tidal wave that sunk the small continent that Atlantis resided on. Now thousands of years later Queen Kida, the daughter of that king, and her husband Milo have risen Atlantis to the surface to build a future for their people. Atlantis' main goal is to rediscover the technologies of their fallen civilization and raise all the sections of their continent. The higher level in the tech tree, the more settlements and territory rise from the ocean, up to seven settlements on the continent with two regions. Their ancient glory gives them a bonus to diplomacy with all non-evil factions. They can only settle the fallen cities on the continent of Atlantis but gain a three turn bonus on research every time the resettle a city. They have superior range, swordsmen, lancers, and wizards. Atlantis has access to fish vehicles and colossai.