Taking over Superman & Lois (2021)'s timeslot because of a COVID-related hiatus, this is the second episode to air on Tuesday; the series previously switched airdates with The Flash (2014) for the "Elseworlds" crossover.
Lillian refers to Dreamer as Dream Girl, the name of the the Legion of Superheroes member whom Dreamer is inspired by. It has previously been established in this series that Dreamer is her ancestor.
Lena calls Kelly, Alex's "person." Chyler Leigh starred in Grey's Anatomy (2005) where two characters referred to each other as each other's person.
During the satellite scene they show a couple shots of civilians living their lives. One shot is a group of people at quiz night at a bar. One of the group's members is dressed like Duckie, Jon Cryer's character in Pretty in Pink (1986).
This episode's title could be a reference to the DC Rebirth comic book event from 2016, which served as a soft relaunch for the DC Universe. It led to all of DC's comic books featuring the Rebirth branding for some time afterwards.