The CW is now home to four DC shows, including Legends of Tomorrow, The Flash, Arrow, and the newest acquisition: Supergirl. That superhero smorgasbord has fans psyched for the four-show crossover which CW President Mark Pedowitz touted at the network’s upfronts earlier this year. It’s an exciting promise, since crossovers involving Barry Allen (Grant Gustin) have gone so well in the past.

The Flash delivers ice cream to Jimmy Olsen and Supergirl in a crossover.
Supergirl reacts to both the crossover episode and ice cream.

This week, Gustin announced via Twitter that he had wrapped ADR (automated dialogue replacement, or dubbing) on The Flash and “Legends”, suggesting he’ll make at least an auditory appearance on The CW’s ensemble show.

What does it mean that the Flash is appearing on Legends? A few things! First, it’s worth noting the villains in DC’s Legends of Tomorrow this season are the Legion of Doom, an alliance of supervillains that includes Malcolm Merlyn (John Barrowman) and Damien Darhk (Neal McDonough) from Arrow and The Flash baddies Eobard Thawne, aka the Reverse-Flash (Matt Letscher) and Leonard Snart, aka Captain Cold (Wentworth Miller).

Thawne is doing double villain duty, as he’s the one pulling the strings behind the Season 3 arc “Flashpoint” of The Flash. While Barry Allen somehow manages to keep Thawne captive — as witnessed in the season’s trailers — it’s not unbelievable to think he could escape with help from his Legion of Doom cohorts. A prison break like that could force Barry to show up in DC’s Legends of Tomorrow.

If not, maybe Barry is just coming in to check on his buddies Firestorm and Atom.

DC’s Legends of Tomorrow premieres October 13.

Photos via CBS