New concept art for 'Arrow' hints at Green Lantern debut

"Arrow" executive producer Marc Guggenheim has posted an exciting piece of concept art from Arrow's fourth season, referencing Green Lantern's return.
Guggenheim had previously claimed that plans for a Green Lantern Corps movie would prevent Hal Jordan from materialising, reported Digital Spy.
The image - which appears to be a mock tourism promo - even adapts the Lantern's iconic 'In brightest day, in blackest night...' catchphrase.
"Arrow" returns to The CW on October 7 in the US.