Are Ultra Beasts coming to Pokémon GO next Season?

A teaser has been released on the official Pokémon GO Twitter feed revealing Nihilego will be the first Ultra Beast to be introduced to Pokémon GO. At the
Niantic and The Pokémon Company have teased that Gen 7 Ultra Beasts are on their way to Pokémon GO - look out for Wormholes!

Pokemon Go Is Adding Ultra Beasts - CNET

Ultra Beast Protection Efforts - Team GO Rocket Special Research (LeekDuck) : r/TheSilphRoad

Pokemon Go Is Adding Three More Ultra Beasts Soon - CNET

Pokémon GO Ultra Beast Arrival Event

Ultra Beasts Are Coming to 'Pokémon GO' Very Soon

Pokemon Go Fest 2022 events will introduce the Ultra Beasts Buzzwole, Xurkitree and Pheromosa

Pokémon GO Fest 2022: Ultra Beasts, Bonuses & More - Cultured Vultures

Pokémon GO - Ultra Beast Arrival - The Shorty Awards

Pokémon TCG: Ultra Beasts GX Premium Collection (Pheromosa & Celesteela)