Marvel Studios used its San Diego Comic-Con Hall H panel to show exclusive footage from "Avengers: Doomsday" and confirm fresh cast additions, though the brief presentation left some fans underwhelmed given the lengthy queues and overnight camping required to attend. Despite the modest scope of the announcements, the panel offered the clearest look yet at the film's ensemble scale, matters to fans tracking how Marvel is merging its separate hero franchises into a single storyline.

The 40-minute session featured only two major reveals but included footage of Doctor Doom summoning an army of Sentinel robots to face a combined force of Avengers, Fantastic Four and X-Men characters, underlining the scale of the coming conflict. Marvel also confirmed the return of Ryan Reynolds as Deadpool and Hayley Atwell as Peggy Carter, with both actors appearing on stage in person to make the announcements.