While the DC Extended Universe assembles its Justice League on the big screen, the Arrowverse is already soaring towards an epic four-way crossover with Arrow, The Flash, Supergirl, and DC’s Legends of Tomorrow. But first: a promo shoot!

Stephen Amell took to Twitter over the weekend to share a glimpse of all the DC TV superheroes suited up and ready for action. Though the photo was presented without commentary and offers no concrete details, it looks like some of DC’s finest — including Arrow, The Flash, White Canary, Atom, and CW newcomer Supergirl — have banded together for the first time to promote the upcoming crossover event.

When Amell told MTV News that the fifth season of Arrow would get back to street-level storytelling, he really wasn’t kidding.

Presumably, the only hurdle this proposed crossover will have to face is introducing Supergirl into the superhero fold, as we know she’s from an entirely different Earth in the Multiverse. Will Barry Allen find a way to bring her to Central City? Or can Cisco create some kind of cosmic window that would connect Kara Zor-El’s Earth to Barry’s Earth-One? Or will Flashpoint still be in effect by the time the crossover airs in December?

Barry Allen, we’re going to need you to speed up time. Or at least get us some ice cream while we wait.