Warner Brothers Supergirl London Popup Event Exclusive Postcards/Bags for Supergirl Exclusive to this specific event on the 20th June 2026! Ultra-Rare Collectable Bags and 7X Postcards in Perfect Mint Condition. Such Collectable Official WB Merch will never be released again and it's a must have for any Supergirl fan going to see this epic movie in cinemas! (ships same or next day)