The Hulk and Iron Man are two of the heaviest hitters in the Marvel universe, both physically and mentally, which is probably why Joss Whedon had Bruce Banner and Tony Stark ride off together at the end of The Avengers.

But who would have guessed the pair would join forces again so soon? Okay, they haven’t really, at least not in any official sequel. However, they are partnering up for the new direct-to-DVD film from Marvel Animation Studios, Iron Man & Hulk: Heroes United.

Recently, Entertainment Weekly got a first look at the film and an interview with Jeph Loeb, Executive Vice President of Marvel’s TV division. According to Loeb, the plot of the movie involves The Hulk and Iron Man fighting Marvel villain Zzzax, a “kind of giant, lumbering brainwave vampire, consuming the electrical impulses in the heads of every living thing it encounters.”

“We see his [Zzzax’s] origin in the movie. It’s what would happen if the entire Eastern seaboard [electrical grid] went out. The two heroes meet up, thinking of each other as to blame.”

In the film,  Adrian Pasdar (NBC’s Heroes) voices Tony Stark/Iron Man and Fred ­Tatasciore reprises his role as Bruce Banner/The Hulk, having previously voiced the character in Ultimate Spider-Man and The Avengers: Earth’s Mightiest Heroes. Zzzax will be voiced by Dee Bradley Baker, who has an extensive background in voice acting and is currently best known for voicing Klaus in American Dad.

While Marvel is deep into developing “Phase 2″ and “Phase 3″ of its live-action movie universe, the company has also made a strong commitment to its animation slate. Currently, another animated film, Big Hero 6, is being developed jointly by Marvel and Walt Disney Studios Animation. And then there’s Marvel’s animated TV shows, including the new show Marvel’s Avengers Assemble, which will replace Earth’s Mightiest Heroes.

Check out a couple pictures from the film below:

Iron Man & Hulk: Heroes United comes out on DVD on April 23, 2013.

Source: Entertainment Weekly