The montage of the Legends hugging right after the wedding is actually just multiple angles of the same shot, except for Nate and Ava's high-five.
The official title and the closed captioning has the word "cul-de-sac," but the cover of Ray's VHS tape says "cul de sac" without the hyphens.
When Damien Darhk shows up at Constantine's house and tells Nora about how he's an Encore, he says "Look, all I know is, I'm up here right now as part of some soul-harvesting pyramid scheme. Honestly, I can't keep up with these millennials and all their newfangled world domination plans." However, the millennial generation encompasses those born between 1981 and 1996. Since Astra, who released Damien's soul from Hell, would've been born around 2005, this would make her part of Generation Z.
Damien Darhk mentioned himself in Hell for 2 years, however, he died in 1992 and chronologically, it is suppose to be 28 years ago.