Niantic announced the first season will add a new weapon, the Charge Blade, layered equipment, a new map feature, Invasions, a new season pass, and new large monsters. Odogaron, Tzitzi-Ya-Ku, and Deviljho are the three new monsters being added, and you’ll be able to unlock the first two by completing steps in the Season 1 story quest. To unlock Deviljho, you’ll need to explore Invasions.
Also added in the new season is Bleeding as a status ailment, and it arrives with Odogaron’s attacks. If you gain bleeding as a status ailment, you’ll suffer additional damage each time you attack or evade.
The new weapon, Charge Blade, has two modes. Charge it up when attacking in sword mode, then switch to axe for massive damage. There will be new skills to learn this season too. A new Celebration questline with 16 new quests beginning March 14th and running through March 24th.
Niantic is adding new and premium season pass reward tracks with activities like slaying large monsters, to earn some goodies as you progress.