I originally figured it was an Arrow/ Flash reference since it was long before the cross-over revealed neither existed, and maybe it was at the time. (You'd have to compare time-frame of when they got their full season order and stuff.)
I don't see Metropolis being it, since Metropolis is named and Superman lacks a mask. Leaves us with Batman/ Gotham I'd think, since GreenLantern would seem too large for Supes not to know.
"I only feel two things Gary, nothing, and nothingness."
then it wouldnt really be nightwing.
they can downplay it some like they did in the old cartoon but a pretty big part of dicks character is that he and bruce have some emotional issues that causes him to want to be his own man.
and the pilots script had dick leaving the batcave in the beginning after a personal betrayal by bruce and him forming a team with starfire who he already knows and then meeting raven, hawk and dove (with a three way love triangle between him, starfire and barbara with her not being batgirl but also not oracle either)
nightwing without batman just doesnt work in my opinion.
dick is essentially daddy issues incarnated, even if bruce never shows up he needs to exist.
- - - Updated - - -
there were rumours last year that they had plans to introduce damian wayne but without the batman connection.
they could have talias child come in at some point if they wish to. although that would just piss the people who are mad about all the batman stuff off even more.
"I was a normal baby for 30 seconds, then ninjas stole my mamma" - Deadpool
"so what do we do?" "well jack, you stand there and say 'gee rocket raccoon I'm so glad you brought that Unfeasibly large cannon with you..' and i go like this BRAKKA BRAKKA BRAKKA" - Rocket Raccoon
FC: 3437-3046-3552
thing is, hes not dead. theyre gonna bring him back and hes going to be a "multiseries regular" which is a new role for characters where they wont be a regular on 1 show but will guest star on all 3 shows repeatedly.
so we will see cold on arrow, flash, and legends multiple times next year so he'll still regularly be in the universe he just wont be in every episode of legends.
how he gets revived who knows.
if i had to take a wild guess, the explosion created some sort of time bomb and sent him somewhere
"I was a normal baby for 30 seconds, then ninjas stole my mamma" - Deadpool
"so what do we do?" "well jack, you stand there and say 'gee rocket raccoon I'm so glad you brought that Unfeasibly large cannon with you..' and i go like this BRAKKA BRAKKA BRAKKA" - Rocket Raccoon
FC: 3437-3046-3552
"I was a normal baby for 30 seconds, then ninjas stole my mamma" - Deadpool
"so what do we do?" "well jack, you stand there and say 'gee rocket raccoon I'm so glad you brought that Unfeasibly large cannon with you..' and i go like this BRAKKA BRAKKA BRAKKA" - Rocket Raccoon
FC: 3437-3046-3552
As the Legends of Tomorrow team visits various times in history, they keep meeting different people that all look like Leonard Snart, with names like Lenny Snart, Lenwin Snart, Leonard Snartwin, etc. All of them have an obsession with cold. He acquires the nickname "The Impossible Boy." Fans of Legends of Tomorrow will continue to deny any Doctor Who influences on the show.
Earth 2 Snart, where he's still a criminal without powers (hence ignored by Zoom), and gets the freeze gun when he hops dimensions.
(Good thing they designed the freeze gun to stop the Flash. It's a shame such a thing couldn't apparently be used against Reverse Flash, Zoom or Trajectory...)
"I only feel two things Gary, nothing, and nothingness."
thing is,in those situations hes still dead.
i want snart back permanently.
"I was a normal baby for 30 seconds, then ninjas stole my mamma" - Deadpool
"so what do we do?" "well jack, you stand there and say 'gee rocket raccoon I'm so glad you brought that Unfeasibly large cannon with you..' and i go like this BRAKKA BRAKKA BRAKKA" - Rocket Raccoon
FC: 3437-3046-3552