I have a theory as to how most of LEGO's unlicensed themes could exist on (mostly) one planet. Firstly, it's important in this world that the different themes are not historical periods, the timeline is the order that the themes were released. For example, the Black Seas Barracuda would not have sailed in the 1700s like a real pirate ship, rather, it would have had its maiden voyage in the year 1989, which is when the set was released irl. The species Homo figurus, or the Minifigure, would have first become an advanced species in the year 1979. They had their first space program in 1978, the same year that the yellow castle was built, and Legotown was established. How is this possible? Well, if you've seen The Lego Movie, you may have noticed that the entire environment was made of legos, and that literally anything was possible to be built. For instance, a fully functioning motorcycle was built out of random parts, and then rebuilt into an aircraft with no difficulty. So, in my hypothetical world, the laws of physics are so different that advanced tech can be easily built, hence the minifigs going to space in their first year of civilization. Why were some minifigs medieval and some modern and some futuristic, all in the same year? Culture. The castle people were just as advanced as the town people, but they each developed different styles of construction due to living on different continents. And every theme took place in the same year(s) in was released in real life. So most of the themes are set on the same planet, including Ninjago. The exceptions would be all the planets visited by Lego Space, the Bionicle planets, the Hero Factory planets, an any other unlicensed themes set on other planets. These would be different planets in the same universe. (this idea does not include licensed themes such as Star Wars.) I originally got this idea from the fact that there are themes whose story connects to other themes, like how Alien Conquest connects to Pharoh's Quest, Atlantis, and Dino,
Monster Fighters, Galaxy Squad, Ultra Agents, and possibly Ninjago are connected, and Minifigures connects to numerous themes. Nexo Knights and Dreamzzz, I think, are some of Ninjago's realms. Only nine of the realms have been mentioned. Homo dollus and Homo duplus, or mini dolls and Duplo figures, are different species in the same genus. Lego Creator sets would fit into various locations. The continents on this planet would be:
A continent similar to North America, where Lego Town, Lego city, Duploville, Heartlake City, Astor City, Newbury, Fabuland, Belville, Western, Dino Attack/Dino 2010, and similar places are located.
A continent similar to Europe+India+Half of China+Japan, where the locations of Lego Castle, Monkiee Kid, Monster Hunters, and part of Adventurers are located. The eastern part is where Lego Adventurers is partially set. Most of Asia is replaced with an ocean, where Ninjago island is. The Original Castle Ninja and Exo-Force themes would be set on Japan, which is much closer to China as half of it is absent, as is most of Asia, to make room for Ninjago's ocean, so makes sense that the Ninjagoans are unaware of the rest of the world. The Northern part of pseudo-china is where Monkiee Kid is set, and the southern part is where Adventurers is set, as that is closer to India, so the plot makes sense. Most of the classic Castle subthemes are set on mainland Europe, except Vikings, which is set in Iceland.
A continent similar to Africa, where most of Lego City Explorers is set, along with Adventurers and Pharaoh's Quest.
A continent similar to South America, where Adventurers and Dino are set.
Islands and underwater locations, such as Aquazone, Dino Island, Alpha Team Deep Sea, Lego Island, Pirates, Islanders, Aqua Raiders, and Atlantis.
A continent similar to Antarctica, were some of Lego City Explorers, along with Alpha Team Deep Freeze.
Any Questions or Comments?