Suggestions by @brutalraynor

Jeryl Prescott

as Nimue Inwudu (Earth-1) in When Legends meet

Ian Ziering

as Daniel Cassidy (Earth-1) in When Legends meet

Myles Truitt

as Johnny Jenkins (Earth-1) in When Legends meet

Chris Carmack

as Whitney Fordman (Earth-1) in When Legends meet

Skyler Gisondo

as Jimmy Olsen (Earth-1) in When Legends meet

Eva Green

as Queen Veranke (Earth-199999) in When Legends meet

Kristy Swanson

as Buffy Summers (Earth-731) in When Legends meet

Alyvia Alyn Lind

as Buffy Summers (Earth-219) in When Legends meet

Alyvia Alyn Lind

as Lexy Cross in When Legends meet

Royce Johnson

as Brett Mahoney (Earth-199999) in When Legends meet

Denzel Washington

as Armando Muñoz (Earth-199999) in When Legends meet

Rob Morgan

as Turk Barrett (Earth-199999) in When Legends meet

Nicholas Galitzine

as Vance Astrovik (Earth-199999) in When Legends meet

Katherine McNamara

as Angelica Jones (Earth-199999) in When Legends meet

Liam Hemsworth

as Balder the Brave (Earth-199999) in When Legends meet

Jeremy Renner

as William Brandt in When Legends meet

Aaron Himelstein

as Cameron Klein (Earth-199999) in When Legends meet

Dolph Lundgren

as Frank Castle (Earth-85) in When Legends meet

Ben Foster

as Warren Worthington III (Earth-199999) in When Legends meet

Geraldine Viswanathan

as Melissa Gold (Earth-199999) in When Legends meet