Warning: SPOILERS for DC's Legends of Tomorrow season 5 finale, "Swan Thong".
Arrowverse's weirdest (and best) series about time-traveling misfit superheroes ended season 5 with some big changes - including the team's Co-Captain, Sara Lance (Caity Lotz), getting kidnapped by aliens. The Legends didn't even realize Sara got snatched when the season 5 finale ended, but when they do, it'll be a somewhat different lineup launching the Waverider into outer space to rescue White Canary.
The Legends of Tomorrow lineup is in a constant state of flux, by design. At the end of Legends of Tomorrow season 5, the only two heroes remaining who were part of the season 1 roster are Sara Lance AKA White Canary and Mick Rory AKA Heatwave (Dominic Purcell). In fact, they've both risen up the ranks of the Legends; Sara was originally a dangerous ex-League of Assassins member seeking redemption and she got promoted to team Captain in season 2. Mick Rory was the ex-con partner of Leonard Snart AKA Captain Cold (Wentworth Miller), but he's now the integral backbone of the group and his revolving door policy for both superheroes and, occasionally, their villains.
Legends of Tomorrow's season 5 finale, "Swan Thong", ended with Sara Lance's alien abduction, forcing the team's roster to unexpectedly change once more. During season 5, Sara's girlfriend Ava Sharpe (Jes Macallan), who was the former Director of the Time Bureau, became the Legends' Co-Captain and headed up missions after Zari Tarazi (Tala Ashe).
This group is the current crop calling the Waverider home, but they also have reliable backup: Gary Green (Adam Tsekhman) is Constantine's apprentice and is kind of a Legend, Astra Logue (Olivia Swann) is now the caretaker of Constantine's haunted mansion in Northumberland County, UK, and Mona Wu (Ramona Young), who is also a Hawaiian werewolf called a Kuape, is a former Legend who pops in now and then. Legends of Tomorrow season 5 also introduced Lita (Mina Sundwall), Mick Rory's estranged daughter who forged a new relationship with her dad. It remains to be seen if Lita will the Legends and become a duo with Heatwave. Of course, the Legends can always count on the Waverider's cheerful A.I., Gideon (Amy Pemberton).
But according to TVLine's plot synopsis for Legends of Tomorrow season 6, a new female hero will the Legends. This mystery addition is described as "a woman who was abducted by aliens as a child and supposedly imbued with powers... either that or she's just crazy." Whoever this new member of the Legends of Tomorrow in season 6 will be, it sounds like she'll fit right in aboard the Waverider.
Meanwhile, Charlie (Maisie Richardson-Sellers), who is also a shapeshifter and the second hero Richardson-Sellers played who left the team after two seasons; the actress previously played Amaya Jiwe AKA Vixen in Legends of Tomorrow season 2 and 3. Charlie was a magical ex-Fugitive who ed the Legends at the start of season 4 but despite her exit from the team full-time, Charlie may still appear in Legends of Tomorrow season 6. As Sara reminded her, "Once a Legend, always a Legend".