Robert Downey Jr. confirmed he has viewed Avengers: Doomsday in advance and offered strong praise for the final product, indicating it surpasses what was shown to audiences during San Diego Comic-Con's Hall H presentation in 2026. He expressed measured optimism about the film's quality and suggested the project may successfully revitalise audience confidence in the franchise following earlier mixed responses.

The Hall H footage centred on Doctor Doom's character journey, portraying his evolution from scientist to antagonist whilst depicting personal elements such as imagery of his family. The presentation also revealed his intention to pursue justice and resurrect a force of Sentinels to oppose the Avengers. The film must navigate high expectations as the successor to 2019's Endgame, which grossed $2.8 billion worldwide, and faces the added context of Marvel preparing an extended cut of that earlier film for release shortly before the new Avengers instalment arrives.