Captain America star Anthony Mackie calls out Robert Downey Jr.'s Doctor Doom for an epic showdown in the MCU's future
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Mackie promises a 'butt-kicking' for Downey's villainous Doctor Doom, hyping up a clash of the titans
With Downey's return to the Marvel Cinematic Universe as the iconic antagonist, fans are buzzing to see how this high-stakes superhero showdown will play out
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Anthony Mackie, Robert Downey Jr., Marvel Cinematic Universe, Captain America, Doctor Doom