Scarlett Johansson
Cast member Johansson poses at a screening of "Don Jon" at the 38th Toronto International Film FestivalReuters

"Avengers: Age of Ultron" could see a follow up of a standalone Hulk movie. Lou Ferrigano, who had played the part of Hulk in "Incredible Hulk" has revealed that the studio is planning for another "Incredible Hulk" movie.

"Now because he saved the day they're making another solo Hulk movie after the second Avengers comes out." Ferrigano told Minneapolis Comic-Con.

Ferrigano will be lending his voice to the Hulk in "Avengers: Age of Ultron", while Mark Ruffalo will be seen playing the role of Hulk and his alter ego Bruce Banner in the Avengers sequel.

It has also been hinted that Marvel studio could also be considering a spin off of Black Widow, played by Scarlett Johansson.

"If you want to see a Black Widow spin-off movie, then I want to see it. We'll see. We will put the request into Marvel tomorrow, " Johansson said during the UK premiere of "Captain America: The Winter Soldier."

Moreover, regarding the characters of "Avengers: Age of Ultron", Johansson revealed some interesting details.

"I think these characters have pretty, kind of, sordid pasts and it's about time that those pasts kind of came back to us in one way or another," Johansson said in an interview with Total Film, adding, "So I think you'll get to really learn a bit about, perhaps, the demons that these characters individually grapple with."

Meanwhile fans are eager to know more about the villain in "Avengers 2". The main villain in the Avengers sequel will be Ultron who apparently is a genuinely disturbed robot.

"I'm having a blast with Ultron. He's not a creature of logic - he's a robot who's genuinely disturbed. We're finding out what makes him menacing and at the same time endearing and funny and strange and unexpected, and everything a robot never is," director Joss Whedon told Empire Magazine.