https://www.gamespot.com/articles/pokemon-go-adding-new-research-quests-involving-ge/1100-6460018/

A new month is quickly approaching, which means more research tasks will soon be available in Pokemon Go. Developer Niantic confirmed on Twitter that the next set of Field Research quests will roll out for the game in July, and they'll revolve primarily around Pokemon originally found in the Kanto region.

Niantic didn't share any further details about what the Field Research tasks will entail, but it did accompany its tweet with a new promotional image featuring the beloved Gen 1 Pokemon Snorlax. Pokemon fan site Serebii.net reports that Ditto, Pikachu, and Eevee will be available as part of the quests as well.