**Traders on the "Avengers: Doomsday" Rotten Tomatoes score market are pricing in a Tomatometer in the mid-80s, with Kalshi forecasts holding steady near 85% since the market opened in spring 2026.** This reflects confidence in the Russo brothers' direction and the expansive multiverse crossover cast featuring Robert Downey Jr. as Doctor Doom, Pedro Pascal's Reed Richards, and returns for the X-Men and Fantastic Four. Historical precedent from Infinity War (85%) and Endgame (94%) supports the range, while recent MCU variability and the sheer scale of expectations introduce some caution. The film opens December 18, 2026, after which early critic reviews will quickly shape the final score and test whether the ensemble and production values deliver Certified Fresh momentum or face review fatigue.