Pokemon Legends: Arceus took fans of the series by storm with its unique gameplay loop, open-world elements, and the way players can interact with Pokemon. There is no doubt that Pokemon Legends: Arceus revolutionizes the tested formula of the series, and seeing how well the game was received it's likely that players will see more of this style in the future. There are rumors about Pokemon Legends: Arceus getting DLC, possibly including new Pokemon or areas and endgame content to look forward to after the hype for shiny hunting dies down.
Despite the fact that there are heaps of interesting stories and lore in the Pokemon universe, Sinnoh (and hence Hisui) was the perfect region for a Pokemon Legends game because Arceus is a god-like figure that created the know universe. However, another fantastic setting for a similar game is the Unova region from Pokemon Black and White, mainly thanks to two specific elements: the so-called Original Dragon and the Heroes of Truth and Ideals. As far as the story goes in Gen 5, there were once two twins who could not decide whether they should pursue truth or ideals, and they shared a Dragon Pokemon that eventually split into two separate beings: Zekrom and Reshiram.
How Pokemon Legends: Arceus' New Moves Could Fare in Competitive Battles
The stories of the Original Dragon and the Heroes of Truth and Ideals are key to the main plot of Pokemon Black and White, and the sequels eventually added theories about Kyurem — a third Dragon Pokemon. Kyurem is said to come from the residual energy from Zekrom and Reshiram's split into two separate entities. Players can fuse this creature to the mascot of Pokemon Black and White's sequels, creating either Black Kyurem or White Kyurem, but never unite
Read more on gamerant.com