India, Nov. 1 -- Robert Downey Jr. and Pedro Pascal have given Marvel fans an unexpected Halloween surprise, and this time, it is their upcoming superhero rivalry that has become the centre of attention. The two actors, who are set to face each other as Doctor Doom and Reed Richards in Avengers: Doomsday, decided to switch their Marvel identities for Halloween. Downey Jr. stepped into the iconic blue Fantastic Four suit associated with Mister Fantastic, while Pascal dressed up as Doctor Doom, complete with the character's signature silver mask and green cloak.

The actors shared a video of their playful costume exchange on social media, giving fans a glimpse of their off-screen camaraderie ahead of the much-awaited Marvel film. The role r...