The next two Pokemon installments have been announced. Nintendo has revealed Pokemon Sword and Shield, which will be coming to the Switch at the end of 2019. This is a new pair of games that will be released simultaneously worldwide and include Pokemon up to Pokemon Sun and Moon, as well as entirely new characters.
Only the three new starter Pokemon for the Galar region were showcased in the first Pokemon Sword and Shield trailer. Fire, grass, and water starters will be available, with people able to choose a fire rabbit named Scorbunny, a grass monkey named Grookey, or a water lizard named Sobble. (As usual, you will be able to trade with other people to get the ones you didn't pick via breeding.)
At the moment, the official website only shows the map of the region and the three starters. However, we do know that the new logos show a sword and shield that each have a dog or wolf head on the top of them. This suggests that the new legendary Pokemon could end up being some kinds of dogs. In the series, there is always one legendary that is exclusive to a specific version of the game.
We should know what the new and exclusive Pokemon are and which characters will only be available in which game later in 2019.