It looks like Natalie Portman will not be returning to the Marvel Thor franchise in the upcoming Thor: Ragnarok film.
Marvel Studios boss Kevin Feige was recently on the Empire Film Podcast and confirmed there would be no return appearance for Portman, citing the setting of the film as the main reason, “Many reasons. Many of which are in the film so you will see that. There are only a couple of scenes on Earth in this movie. 80 to 90 percent takes place in the cosmos.”
Portman had reportedly been upset when the director of Thor: Darkworld was dismissed and many assumed she would not want to return. It looks like the plot of the new film will make it unnecessary for a return of Jane Foster anyways.