For those of you that don't know what the "Flarrowverse" is, it's the CW universe of The Flash and Arrow (so together it makes Flarrowverse). Recent easter eggs in The Flash and Arrow suggest that Hal Jordan/Green Lantern could feature in the show!
About Hal Jordan
Hal Jordan is one of one of the most known Lanterns to people who don't know much about Green Lanterns. Hal was born in Coast City. As a young child, he idolized his father, a test pilot who worked for Ferris Aircraft. At a very young age he watched his father die in a plane crash. Even after witnessing his father's death he still followed in his footsteps. Years later a dying member of the Green Lantern Corps named Abin Sur crashed in California to find a future member to replace him. That is how Hal Became a Green Lantern.
Flash Season 1 ep. 22
The team Flash had to move all the Meta-humans from S.T.A.R Labs, so Amanda Waller organized them to meet at Ferris Air Craft (First Easter Egg), to take them somewhere else. Once they got there, somebody said that this place has been closed down since one of their best pilots disappeared in a mission (Second easter egg)
Arrow season 4 ep. 1
The third one was about 8:50 into episode one of Arrow during a flashback scene.
Now if you look at the sign properly it says;
In Brightest day
In Blackest nights
Come to Coast City
Where Money's Tight.
Now if you know about Green Lanterns they go by a specific oath that goes Like this:
See what's in common?
Now at this point you are probably thinking something like? "Well how do you know it's Hal Jordan?-It could be John Stewart or another lantern!" I was thinking the same thing until my final easter egg got revealed. In another flashback when he gets drugged, just before that they show this on the scene
This could mean one of two things. One-There is someone with the name Jordan and its their favorite jacket. Or two-It's the missing pilot they were talking about from Ferris Airlines.