From his introduction, Thor always had an affiliation to human scientist Jane Foster. She became the prominent reason for the hero to really reprimand his past actions and even earn his hammer Mjolnir. Okay, she wasn’t the only reason but she did play a major part in it. But by Thor: The dark world, it seemed like Jane foster had become a lesser relevant.
Marvel Cinematic Universe has a tendency to cut out pivotal characters from previous movies in lieu of their heroes experiencing new adventures. With Thor: Ragnarok, it looks as though the Asgardian god has let go of his former paramour to search for his father and save Asgard from Ragnarok. Natalie Portman, who plays Foster had told the Wall Street journal that she was “done” with Thor for now and Chris Hemsworth told EW:
“He’s off exploring the universe, still trying to police it and control the mayhem. But he’s certainly enjoying being a drifter, being a solo cowboy out there.”
The hero may not be single too long, though, as the new character Valkyrie seems to be the new replacement for Foster. The characters meet when they are both on the Planet Sakaar, imprisoned as gladiators forced to fight in combat with others like them. Kevin Feige, Marvel Studio’s President told the magazine why Valkyrie is a better match for Thor. Feige said:
“ We wanted Thor to encounter somebody that was near his equal and that his relationship with Jane may have evolved in unexpected ways in between The Dark World and Ragnarok and we wanted to pit him against a character who was much more his equal and in many ways his superior. Valkyrie is trying to not embrace any sort of Asgardian heritage that she has. Thor thinks maybe that will create a bond between them and, on the contrary, she wants to forget it all entirely.”
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It’s doubtful that Foster will be gone for good, since Marvel may bring her back for Avengers: Infinity War, but until then, Thor will be battling Hela with Hulk in Ragnarok, and maybe Valkyrie by his side.