Season of Dawn

 is the ninth season of Destiny 2 and the second seasonal content for Shadowkeep, starting from December 10th, 2019 and ending on March 9th, 2020. The story consists of Guardians returning to Mercury to assist Osiris in stopping the Red Legion from changing history using a hijacked time machine. This season also features the debut appearance of Saint-14, a legendary Titan who suffered a final death only to be saved from his fate.

Description
DEFEND THE TIMELINE "With the Vex Invasion now defeated, Osiris calls upon you to face a new threat. Stop a council of Cabal Psion Flayers from manipulating time and undoing our victory against the Red Legion."

Trivia

 * This season sees the return of the Red Legion as the main enemy Guardians face.
 * This season sees the second time the Cabal as the main species antagonist.
 * This season marks the first time Psions are the main antagonists.