Assassin's Creed: Odyssey - 9 Future Settings Ubisoft Must Use
9. Feudal Asia
Perhaps the longest standing fan request for a historical period is that of feudal Asia, particularly Japan between the years 1100 and 1600 when Shoguns ruled the land and Samurais fought their battles for them.
There's already a distinct aesthetic in terms of armor, weapons, buildings and geography for the country that would make the game look distinct compared to some of the other games in the series, which were all set in similar-looking cities. Since Japanese Samurai were noted for being particularly barbaric in wartime, both to their own people and the enemy, the increasingly gray morality of the series could continue with the heroes siding with a faction that doesn't align totally to their views.
Assassin's Creed Chronicles, a 2.5D platformer, had an instalment set in China, yet this isn't really considered as part of the main series, and fans are still clamoring to explore Asian history. Chronicles at least confirmed there is an Assassin infrastructure in the east, so it would make sense within the lore.
With Ubisoft's apparent love for the bigger, more well-known periods of world history, there are probably a few more places they'll want to set games in before Asia. One of these is...