Are there any confirmed sequels?

Question

I classify B2W2 and USUM as sequels, but has any other source confirmed them as such?

No side games plz!

Comments

"Their" is used to show possession.

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BW2 is definitely confirmed as a sequel by a bunch of in-game things. USM seems to be more of an alternate universe thing.

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USUM is the Emerald/Platinum of Gen VII, but as 2 versions

Answer 1

The games [BW2] take place two years after the events of Pokémon Black and White.

source

Pokémon Ultra Sun (Japanese: ポケットモンスター ウルトラサン Pocket Monsters Ultra Sun) and Pokémon Ultra Moon (Japanese: ポケットモンスター ウルトラムーン Pocket Monsters Ultra Moon) are the second paired versions of Generation VII and feature an alternate storyline from Pokémon Sun and Moon.

source
So BW2 are sequels. USM are not.