MEWTWO  IN  EXCLUSIVE  RAIDS  WORLDWIDE  VERY  SOON

Niantic has revealed the official details on Mewtwo Raids! Mewtwo will be rolling out via Exclusive Raids, which are invite-only. To receive an invite, a Trainer must have completed a Raid at the Gym recently (no clarification about how recently). Invitations will be given out ahead of time, allowing for coordination between Trainers to happen. Additionally, Niantic has said that more powerful Pokémon will be joining Mewtwo in Exclusive Raids soon (Ho-Oh, Mew, Celebi, and the Legendary Dogs are still up for grabs)!

THE  RETURN  OF  THE  THREE  legendary  BIRDS  OF  KANTO

The Legendary Birds have returned! Articuno, Zapdos, Moltres, and Lugia are now all available in regular Raids worldwide! They'll be available in Raids until the end of the month (August 31). Get out and get them while you can, especially if you missed out (or didn't get good IV versions) the first time!

Will  other  high  cp  pokemon  be  slightly  nerfed?

In his latest video, Reversal mentioned something interesting: Slaking. Now that we know Niantic is willing to go off-formula for CP4000+ Pokémon, will others be nerfed? Slaking, Ho-Oh, Rayquaza, Kyogre, and Groudon are the only other Pokémon that break CP4000 in Generations 1, 2, and 3. It seems probable, although Niantic has not given any details officially or in the GAME_MASTER file yet.