Inside the issue - which is available for just £1.99 on your iPad - Johansson reveals that she was initially sceptical about Marvel's grand plan after making Iron Man 2 .
"The idea of it is ridiculous!" she says. "When they told me that was the next step, I said, 'Oh, no! That is a disaster! You saw Thor , you saw Captain America , you saw Iron Man , those things don't go together!'"
Since starring in the third highest-grossing film of all time ( Avengers , ahead of this year's Captain America: The Winter Soldier ), she's come around.
Revealing that she's expecting the script for Avengers: Age Of Ultron "any day now", she promises "when it comes you can guarantee it'll be read in 25 minutes".
Captain America: The Winter Soldier opens on 28 March 2014.
The Avengers: Age Of Ultron opens in the US on 1 May 2015 with a UK release date yet to be announced.
For more from Johansson, pick up the brand new issue of Total Film , which is out now, and includes an exclusive look at the heroes of 2014, including The Amazing Spider-Man 2 , 300: Rise Of An Empire , Muppets Most Wanted , Transformers: Age Of Extinction , and many more exciting new movies .