In an email newsletter, Niantic teased a new event. This event will center around the Kanto Region (Generation 1), and begin on Tuesday, April 10, 2018. No further information is known about this event at this time. SOURCE: Niantic's Email Newsletter
2. Latios and Latias descend
Latios and Latias have come to Raid Battles following the departure of Lugia. Latios is found in North America, Africa, and South America. Latias is found in Australia, Asia, and Europe. They'll switch places on May 8, before leaving on June 5. SOURCE: Niantic
3. New pokemon to be revealed today
A new trailer for the upcoming Pokémon movie will air in Japan on Monday (which is this afternoon / evening in America). This trailer has been confirmed to feature an unreleased Pokémon. SOURCE: Serebii, Pokeshopper
4. Get an ampharos with dragon pulse
Niantic has revealed that on the upcoming Community Day, April 15, the exclusive move for Ampharos will be Dragon Pulse. Additionally, the sprites for the Shiny variants of Mareep, Flaaffy, and Ampharos have been discovered in the network traffic. SOURCE: Niantic, Chrales
5. Weekend trivia
This Pokémon lives in mountainous regions, far away from people. In gains the experience needed to evolve by training against its own kind. Who's that Pokémon: Jangmo-o, Axew, Bagon, or Tyrunt? Voters were in favor or Bagon, but the correct answer in Jangmo-o. SOURCE: Official Pokédex, pokemon.com