Spider-Man: Brand New Day dominates the 2026 box office race with its record $360 million domestic opening, $2.52 billion worldwide total, and status as the highest-grossing film of the year by a wide margin, fueled by Tom Holland and Zendaya's star power, strong critical and audience reception, and extended theatrical legs. This established performance underpins the market's heavy 89.5% implied probability, reflecting trader confidence in its unassailable lead. Avengers: Doomsday, slated for a December 18 release with Robert Downey Jr. as Doctor Doom and the Russo brothers directing, carries the remaining 10.5% on multiverse hype and franchise momentum, though its late timing limits upside potential before year-end. Other titles like Wicked: For Good and The Odyssey have already finished their runs well behind.