Since the Arrowverse is known for creating many spin-offs, I thought it might be pretty cool to suggest a Prometheus spin-off.
There are a few reasons why it would be successful:
Stephen Amell said that Prometheus was his favorite villain, so that could mean he shows up in a cameo (which would gather viewers).
It would bring the character more fan familiarity. Other than Arrow and a DLC for Lego DC Super-Villains, he is not well-known, other than comics.
A whole season could be dedicated to just his training or planning for dealing with the Green Arrow (the episode where GA accidentally killed Felicity’s boyfriend indicated the expertise and careful planning of Prometheus).
Less of persuasion and more of a cool idea- if a layout idea would be interesting, then the Prometheus spin-off could take inspiration from Dishonored: Knife of Dunwall.
Just like the DLC put Daud as the protagonist with a mission including a fight scene with Corvo, which was the same fight scene in Dishonored, but opposite perspectives, a similar mechanic can take place for the Prometheus spin-off.
What do you think? Should there be a spin-off? What would you like to see if one could be made?