Iron Man & Hulk: Heroes United

Iron Man and Hulk must put aside their differences and work together to protect Earth from a powerful entity of pure electricity called Zzzax. This creature was accidentally created when Hydra scientists tried to merge gamma energy with a Stark Arc Reactor. To stop Zzzax and prevent a global blackout, the two heroes must fight through various obstacles, including robots, Wendigos, and the Abomination.

Released in 2013, this American animated action film was produced by Marvel Animation. It was co-directed by Eric Radomski and Leo Riley. For Radomski, this followed his work on Batman: Mask of the Phantasm and Monster High: New Ghoul at School. For Riley, this was the first of two collaborations with the franchise, preceding Iron Man & Captain America: Heroes United. The screenplay was written by Henry Gilroy and Brandon Auman. The voice cast features Adrian Pasdar as Tony Stark and Fred Tatasciore as Hulk, with Dee Bradley Baker and Robin Atkin Downes voicing the primary antagonists.

The movie has a runtime of 71 minutes and is categorized under the adventure, family, and science fiction genres. Audience reception is mixed, as shown by a 4.6 rating on IMDb from 3,700 votes and a slightly higher 5.9 rating on TMDB from 222 votes.