On the Call of Duty blog, you can read a complete list of the updates Activision is making to Modern Warfare II and Warzone 2.0.
Two cargo tanker wrecks and a feudal castle with cherry blossoms in the spring can be found on Ashika Island. Activision is incorporating Restore Honor, a map-exclusive feature that lets you earn some in-game money and intelligence by picking up the dog tag a player leaves behind the first time they die during a match, in keeping with the Japanese theme. By completing tasks based on the samurai’s Bushido code, you can earn items from the new “Path of the Ronin” seasonal event, such as a weapon charm.