Robert Downey Jr. (Photo: WikiCommons/GeorgesBiard)
Robert Downey Jr, who plays William Stark in "Avengers: Age of Ultron."WikiCommons/GeorgesBiard

The Iron Man suit has been upgraded in the second installment of Avengers and Tony Stark will be seen wearing a Hulk-like armor known as the Hulkbuster in "Avengers: Age of Ultron," reports said.

Marvel Studios President and producer Kevin Feige showed a two-minute reel from the movie during a Q&A session held after the "Guardians of the Galaxy" sneak preview in London, and it showed a fight sequence between Iron Man and the Hulk.

Stark's Hulkbuster suit is almost the size of the green monster, and Radio Times described the bulked up armor as "the iPad to the original's iPhone."

It is unclear why the two are fighting.

The footage also featured the brother-sister duo Scarlet Witch, played by Elizabeth Olsen, and Aaron Taylor-Johnson's Quicksilver, and the former's "warping powers" were showcased when she made bricks float in the air.

A glimpse of the redesigned Stark Towers was provided and it featured floor to ceiling windows, twin laboratories for Stark and Bruce Banner, and parking for supersonic jets, according to Radio Times.

"Avengers: Age of Ulton" will see the superheroes fighting the villainous Ultron and his army in countries as far as Korea, South Africa and Italy.

Ultron was originally created to aid the fight against evil. But because the robot lacked the human touch, it started viewing humans as enemies, and embarks on a mission to get rid off all humans from the face of the earth.

"Ultron sees the big picture and he goes, 'Okay, we need radical change, which will be violent and appalling, in order to make everything better'; he's not just going 'Muhaha, soon I'll rule!'" writer-director Joss Whedon revealed to Entertainment Weekly.

Ultron will have Scarlet Witch, Quicksilver and The Vision, played by Paul Bettany, as aides, Whedon revealed.

"They're on Team Ultron, which makes things really hard for the Avengers because all of a sudden they're dealing with powers that they're not used to," Whedon told Entertainment Weekly.

"With the [first] Avengers, everybody pretty much had the power of being able to punch somebody, and now we have a woman who can get inside your head and move objects, and a boy that can move faster than anything, and a robot [Ultron] who can self-replicate and is out of his mind. So all of sudden, it's a darker, weirder, tougher world that they're living in."

"Avengers: Age of Ultron" will hit theatres on May 1, 2015.