Robert Downey Jr returns as Doctor Doom in Marvel’s Fantastic Four post-credits scene

The Fantastic Four: First Steps introduces the iconic team in a retrofuturistic setting, teasing Doctor Doom's arrival in the MCU. A post-credits scene reveals Doom's interest in Franklin Richards, a powerful child. Robert Downey Jr. returns as Victor Von Doom, signaling a shift from Kang as the saga's main villain, with Avengers: Doomsday slated for 2026.