6 lingering Avengers: Endgame questions answered by the filmmakers

The writers and directors behind Avengers: Endgame are ready to talk spoilers.

Now that co-directors Joe and Anthony Russo and screenwriters Christopher Markus and Stephen McFeely have given a whole series of in-depth interviews about Endgame, let's take a look at some of the key lingering questions they've answered. Warning: spoilers ahead.

1. Mjolnir — Was Captain America always worthy of lifting Mjolnir, or did he become worthy since Avengers: Age of Ultron? Anthony Russo told Happy Sad Confused it's the former, saying Steve Rogers previously chose not to lift Mjolnir out of "humility."

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2. Katherine Langford — Where was Katherine Langford, whose casting in Endgame had been reported? The Russos said she originally played an older version of Tony's daughter in a vision reminiscent of Thanos seeing young Gamora in Infinity War, but her scene was cut due to poor test screening reception.

3. Gone for good? — Could any deaths still be undone? Well, screenwriter Christopher Markus told Fandango that "when we kill somebody, except with a Snap, they're dead," while Anthony Russo said that the Soul Stone sacrifices can't be undone by returning it, Slashfilm reports.

4. The Infinity Stones — Are the Infinity Stones really destroyed forever? Not exactly, as the Russos have confirmed the stones still exist in the universe on an "atomic level."

5. Loki — The Russos told Business Insider that the alternate timeline Loki is indeed still out there. Could this set up his Disney+ show?

6. The ending — Here's the big one: Does Steve Rogers return to an alternate timeline, or the past of the main timeline? The directors and writers have given totally different answers, with Joe Russo telling Entertainment Weekly that Steve going back "would create a branched reality," while Markus told Fandango, "I reject the 'Steve is in an alternate reality' theory." The debate, then, may rage on for years — perhaps to be hashed out on the blu-ray commentary.