It certainly looks like Thor is a single god again. According to Natalie Portman, her time in the Marvel Cinematic Universe is at an end. Jane Foster's absence from Thor: Ragnarok is likely to be a permanent development.
"As far as I know, I'm done," she revealed in an interview with The Wall Street Journal. "I don’t know if maybe one day, they'll ask for an Avengers 7 or whatever, but as far as I know, I'm done. It was a great thing to be a part of."
Of course, Portman's astrophysicist has been rather left behind by the evolving state of the Marvel Cinematic Universe. We last saw her in Thor: The Dark World (2013) and, although Thor mentioned her at Tony Stark's party in Avengers: Age Of Ultron (2015), she has inevitably faded into the background since her Norse love interest returned to Asgard.
If true, it is a departure from Marvel's policy of keeping its players on long contracts, even if she seems to have left the window open for a return down the line. Don't bet against that Avengers 7 prediction coming true one day, albeit with a different title. Portman has her Jackie Kennedy film, Jackie, on the way, as well as a turn in Terrence Malick's (Tree Of Life) next movie Weightless.