“This is the first time Ultraman will meet the Avengers, despite them having so much in common – both being created in the 1960s, both being arguably the most popular and successful super heroes from their respective countries of origin,” said Groom and Higgins in a statement accompanying the announcement.
Groom revealed an Ultraman/Marvel crossover at Anime Expo in 2022 (see “Marvel Heroes to Team Up with Ultraman”), saying the stories would be set in the current Ultraman continuity and that Spider-Man, Captain Marvel, and Iron Man would make appearances.