There's a new Pokemon project in the works. More details will be revealed in a "big announcement" next week.
So yes, this is an announcement of an announcement, with the teaser site saying, "This summer, details of a stunning new project from Pokemon will be announced." The teaser site specifically states, "shougeki no shin purojekuto" (衝撃の新プロジェクト) with "shougeki" ( 衝撃) meaning "shocking" or "stunning" and "shin" (新) referring to "new."
