Phase 2 is the second phase of DC Extended Universe movies. Because DC has to do everything exactly like Marvel or fanboys will whine about it, the execs at WB decided to call them phases too.
Nightwing: Legacy of the Bat (2019)
Green Lantern Corps (2019)
The Flash (2020)
Wonder Woman 2 (2020)
Untitled Green Arrow Film (2021)
Man of Steel: Last Sons (2021)
Young Justice (2022)