VIDEO : Why Natalie Portman Won't Be Joining The Cast Of 'Thor: Ragnarok'

Natalie Portman has left Marvel Cinematic Universe's Thor franchise. How will her character's absence be explained in the upcoming 'Thor: Ragnarok?' Chris Hemsworth explained in an interview that Thor is off doing his own thing now. '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,' said Hemsworth. 'Thor: Ragnarok' hits theaters November 3.