After the successful crossover event of the Arrow and The Flash, Stephen Amell who plays the Oliver Queen on the Arrows is looking to do more crossover work with the other DC Comics television properties, Gotham and Constantine.
In an interview with USA Today he had this to say on the idea:
“I know the logistics are challenging and the politics are above my pay grade, but in the interest of putting the best product forth for the fans, I don’t think we should limit ourselves to Flash and Arrow crossing over because we’re both on the CW. If you’re owned by Warner Bros., or if you’re just in the DC Universe, everything should be in play.”
Grant Gustin who plays Barry Allen on The Flash, was skeptical on the idea of The Flash appearing in Gotham, because of the age difference between Barry and Bruce (we agree with him on that). Though he did say he’s looking forward to a possible crossover with the Supergirl television series, once The Flash executive producer Greg Berlanti gets that show together for CBS.
Source: USA Today