Arrowvillain Prometheus to appear in four-way crossover

But Josh Segarra won’t be returning, so who’s under that mask?!

Well, sort of!

Our theory: Quentin Lance (Paul Blackthorne).

Credit: Bettina Strauss/The CW

In the end, however, it was a set-up by Segarras Adrian Chase.

Another theory: It could be Roy, as Colton Haynes recentlytweetedRoy would soon return.

For this crossover event,Arrowwill air on a special night Monday at 9 p.m.

DC Comics

ET followingSupergirl, while the other DC shows will remain in their regularly scheduled time periods.