The strings are there, and it would certainly be interesting to see how Arrow would bring The Spectre to life.
So, a Green Arrow and The Spectre team up may not seem too far-fetched after all.
In the DC Comics, James Corrigan embodies the spirit of vengeance (hence the speculation caused by Bamford’s tweet) as he wreaks havoc under the moniker of The Spectre.
After NBC cancelled Constantine, the hellblazer found himself in Star City when Matt Ryan guest starred as John Constantine on Arrow.