Avengers: Doomsday’s December 18 release has driven strong trader interest through Marvel’s expansive official cast announcements and trailer footage from San Diego Comic-Con 2026, confirming returns for Robert Downey Jr. as Doctor Doom, Chris Evans as Steve Rogers, the full Fantastic Four led by Pedro Pascal’s Reed Richards, multiple X-Men including Patrick Stewart’s Professor X and Ian McKellen’s Magneto, plus Thor, Loki, Sam Wilson’s Avengers team, and New Avengers members like Florence Pugh’s Yelena. The multiverse premise and three-team collision narrative fuel speculation on unconfirmed cameos such as Spider-Man or Doctor Strange, where conflicting reports and MCU precedent create volatility. Recent presales topping $125 million and ongoing promotional appearances underscore momentum ahead of final cut decisions.