The star filmed a moment that was deemed too confusing by test audiences.

When audiences walked into Avengers: Endgame, one member of the cast was nowhere to be found on the big screen: Katherine Langford. In October, news broke that the 13 Reasons Why star had filmed scenes for the fourth Avengers film, and speculation swirled about who she could be playing. Hawkeye protege Katy Bishop? A grown version of Ant-Man's daughter Cassie? Death herself? It turns out, she had been cast as an adult version of Morgan Stark, daughter of Tony Stark (Robert Downey Jr.). Endgame directors Joe and Anthony Russo revealed on MTV's Happy Sad Confused podcast that they filmed the scene with Langford that would have mirrored an Avengers: Infinity War scene in which Thanos (Josh Brolin) saw a younger version of his daughter Gamora after he used the Infinity Gauntlet to wipe out half of all life in the universe.

"There was an idea that Tony was going to go into the metaphysical way station that Thanos goes in when he snapped his fingers, and there was going to be a future version of his daughter in that way station," Joe Russo said. "We showed it to a test audience and it was really confusing for them." Added Anthony Russo: "We didn't feel an emotional association with the adult version of his daughter. It wasn't ringing to us. It wasn't resonating to us on an emotional level is why we moved away from it." The idea would have been that after Tony Stark sacrificed his life by using the Infinity Gauntlet to kill Thanos and his minions, that Morgan would forgive him for leaving the family behind.