Strong presale momentum for both Avengers: Doomsday and Dune: Part Three, combined with their December 18 holiday timing and established fanbases, drives the 97.3% market-implied odds that Dunesday’s combined domestic opening will surpass Barbenheimer’s roughly $235 million benchmark. Early tracking and IMAX sellouts signal record-level demand for the dual tentpoles, echoing how complementary blockbusters lifted each other in 2023 while exceeding historical weekend totals. Industry analysts note the films’ wide appeal and built-in cultural conversation as key tailwinds. Realistic upset scenarios remain limited but include significant audience cannibalization from overlapping demographics, unexpectedly soft reviews for either title, or last-minute external disruptions that could cap the combined haul below the threshold.