As The Avengers begins the homestretch towards its release, new details about Iron Man 3 have been leaked that point to a reunion of sorts between Iron Man and The Black Widow. According to The Daily Blam, a casting call sheet has revealed that Scarlet Johansson will return as the Russian super-spy for the third installment of the series. If true, it will be interesting to see if her appearance is substantial or just a cameo. The report also confirms that Don Cheadle and Gwyneth Paltrow will be back as War Machine and Pepper Potts respectively.

The casting call doesn't reveal much more about director Shane Black's vision of the film, but recent reports have pointed to a plot that involves nano-technology. It isn't known how much the plot of The Avengers will lead into Iron Man 3, but with the Widow returning, the smart money would be on a pretty strong connection between the two films. 

[via The Daily Blam]