Recent announcements and promotional footage for Avengers: Doomsday have fueled trader focus on multiverse crossovers, with directors Joe and Anthony Russo confirming additional unannounced cast members beyond the large ensemble already revealed at D23 and San Diego Comic-Con. Key drivers include confirmed returns for Steve Rogers, the Fantastic Four, multiple X-Men actors, and Thunderbolts characters, alongside teases of Hulk involvement from Endgame Encore footage and strong pre-sales nearing $50 million. High-implied probabilities for fan favorites like Wolverine and Deadpool reflect ongoing speculation around multiverse cameos, while lower odds for others highlight historical patterns of selective legacy returns. The December 18 release date and upcoming marketing events will likely trigger further shifts as more details emerge.