Ok so BW2 chapter/arc is out! It doesn't have an English translation yet (like the ends of HGSS chapter and BW chapter) .It takes place 2 years after BW chapter. The two new characters are Rakutsu and Faitsu (Not Black2 and White2 but it's sinabi their names are how White2 and Black2 are pronounced in Japanese(?) Not much about it is known tough. there is a person from Tumblr who has uploaded some scans .

(In not much order)
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SPOILERS
Rakutsu is a undercover member of the International Police and is a higher rank than Looker!
Faitsu is an ex-member of team Plasma .
They're 12 taon olds.