Last month we heard from James McAvoy on the status of Wanted 2, and he said he hadn’t heard anything official yet however director Timur Bekmambetov would be contacting him in the near future to give him an update. Now creator of the graphic novel, Mark Millar, has spoken to IGN about the sequel and he said that filming should begin soon. He also said they had to rework the script a few times to make sure everyone was happy (Angelina Jolie, Paramount etc).
So it looks like they will be going international in the sequel. We first heard about this idea back in 2008, and it seems like a cool way to go. Director Timur Bekmambetov is Russian, so that might be a possible location.