Well, that was unexpected.
During the Japanese version of today's Nintendo Direct broadcast, there was a surprise announcement that wasn't present elsewhere in the world: Ubisoft's Assassin's Creed Odyssey is coming to the Nintendo Switch.
However, before you get too excited, it would seem that the French super-publisher has taken a leaf out of Capcom's book as this will be a cloud-based version of the game, much like the Switch version of Resident Evil 7. The game itself will run on a remote PC and footage will be streamed to your console over the internet. As a result, image clarity and general responsiveness are likely to suffer as a result, and performance is naturally going to be impacted by network traffic and the speed of the connection used.
Why Nintendo decided against showing this trailer in the west remains to be seen, but it's worth noting that none of the other Switch cloud-based games have made it out of Japan as yet.