Now that the Arrowverse's Crisis On Infinite Earths is over, DC's Legends of Tomorrow will reflect the big changes resulting from the crossover while remaining endearingly weird. Legends of Tomorrow closed out Crisis with "Part 5," in which Supergirl (Melissa Benoist) and Black Lightning (Cress Williams) discovered that they now live on the same Earth as the Flash (Grant Gustin), the cast of Arrow, and the Legends. As his dying act when he rebirthed the Multiverse as the Spectre, Oliver Queen (Stephen Amell) merged the worlds of his friends into one: Earth Prime.
On Legends of Tomorrow, Crisis "Part 5" saw the superheroes finally defeat the Anti-Monitor (LaMonica Garrett) once and for all, thanks to Ray Palmer (Brandon Routh) and Ryan Choi (Osric Chau), who had the ingenious plan to shrink the cosmic despot into the "atom-verse" (not to be confused with Marvel's "microverse"). The Legends played a crucial role during the Crisis: Sara Lance (Caity Lotz), the team's captain, was revealed as the Paragon of Destiny, one of the seven Paragons who the fate of the Multiverse depended on. In addition, the Waverider of Earth-74 — powered by the A.I. of Leonard Snart (Wentworth Miller) — served as the Paragons' headquarters, while Mick Rory (Dominic Purcell), Ava Sharpe (Jes Macallan), and Nate Heywood (Nick Zano) also had roles to play during the crossover. And John Constantine (Matt Ryan) was pivotal in helping locate Oliver Queen's soul in Purgatory so he could be reincarnated as the Spectre and defeat the Anti-Monitor at the dawn of time.
With the dust settling on the Crisis, Legends of Tomorrow season 5 can finally launch. The wacky series will be picking up from the events of Legends season 4, which saw the misfit outsiders become celebrities. At the end of Legends season 4, Sara Lance and her crew defeated the demons Neron and Tabitha (Jane Carr) at Heyworld, a theme park full of magical creatures, with the power of positivity (and the help of a dragon named Wickstable). After years lurking on the outskirts of the Arrowverse, repairing problems with the timeline (that they often caused themselves), the Legends begin season 5 more famous than ever as they finally get the recognition that has been denied to them. But their win against Neron came at a cost; the timeline was altered so that Zari Tomaz (Tala Ashe) never became a Legend and instead, her place on the team was filled by her brother Behrad (Shayan Sobhian), who is now alive. Worse, the Legends are unaware of the magical switch.
However, Sara Lance will be irrevocably changed after the events of Crisis. Losing Oliver meant that everyone she considered her family is now dead (although it's not yet clear which version of her sister Laurel is now living on Earth Prime). But during Crisis Part 5, Sara also took command of the superheroes, first when they faced a giant Beebo — an illusion by Sargon the Sorcerer (Raul Herrera) — and later against the Anti-Monitor. White Canary led the heroes to their greatest victory and when it was all said and done, Sara took her place as part of the Arrowverse's version of the Justice League alongside Flash, Supergirl, Superman (Tyler Hoechlin), Black Lightning (Cress Williams), J'onn J'onzz (David Harewood), and Batwoman (Ruby Rose). Still, Sara will be nursing the emotional scars from Crisis for a while, which is bound to affect her relationship with Ava and her leadership of the Legends.
Ray Palmer's future also bears watching since it's already known that Brandon Routh and Courtney Ford, who plays Nora Darhk, will, unfortunately, leave Legends of Tomorrow at some point in season 5. During Crisis, Ray met his doppelganger, who happened to be Kingdom Come Superman, but the Atom was a pivotal reason why the heroes saved the Multiverse. The events of Crisis could be a catalyst to why Ray and Nora will ultimately exit the Waverider.
The Legends will spend season 5 chasing "Encores", history's greatest villains released from Hell by Astra Logue (Olivia Swann), but now that Earth Prime exists, it means the Legends may encounter history that has been changed due to the merging of Earth-1 with Earth-38 and Black Lightning's Earth. So while Legends of Tomorrow will lean heavily into their trademark weirdness and humor, whatever alterations to history the Legends discover in Earth Prime's timeline certainly bears watching.