Legends of Tomorrow finally returned Monday night after a long winter hiatus, with Constantine (Matt Ryan) temporarily joining the crew of the Waverider for an exorcism and maybe providing an important clue to Big Bad Mallus (voiced by John Noble). However, a more permanent change will happen week after next when Kid Flash (Keiynan Lonsdale) finally makes his debut on the time-travel series. Then we have Citizen Cold (Wentworth Miller), who will bow out of the Arrowverse at some point sometime this season.
Executive producer Marc Guggenheim recently opened up to Entertainment Weekly about the arrival of the speedster on the show and how the Legends will react to him. He also touched upon Leo Snart’s sendoff from the series—which was thankfully different from his Earth-1 doppelganger Captain Cold’s.
Speaking about Wally West’s imminent arrival on the series, Guggenheim explained that they will follow the path the character started on during this season of The Flash. “He’s gone on a walkabout, and he kind of feels like he doesn’t fit in anywhere, which makes him perfect for Legends, because Legends is a whole team full of people who don’t fit in anywhere. So Wally is basically brought to the team by Rip Hunter, of all people—so you will definitely see him back—and once he meets them, he decides this is a really good group to stay with.”
The showrunner also teased how the Legends will take to Kid Flash’s addition to the crew, and there’s one member in particular who may have a bit of a hard time with the addition of the "cocky" speedster. “I think Amaya probably struggles the most with it at first, because it’s incredibly annoying to have someone on the team who can just fix every problem in the blink of an eye.”
While we knew the addition of Leo Snart, aka Citizen Cold, on Legends in the wake of the Crisis on Earth-X crossover event wasn’t permanent, since Wentworth Miller is officially leaving the Arrowverse (although he's open to return), Guggenheim’s comments about the character’s sendoff certainly leave the door open for him to come back at some point down the line.
“Leo never says, ‘I’m staying with the team permanently.’ He has said, ‘I’m gonna stay until they get over their death, until they mourn the death of Stein,’" he explained. "And you see that happen, and Leo leaves with—he has a really good reason to leave. And he’s leaving for a very, I think, positive reason. And he leaves with, I’d say, a really good piece of advice for Sara.”
Legends of Tomorrow airs Monday nights at 8 p.m. on The CW.