For this, we need the opposite of that Chris Hemsworth will return someday ... if Marvel wants him to.

Hemsworth is currently out promoting his new movie "12 Strong," which opens this Friday, Jan. 19. Of course, he's always asked about Marvel movies, and what he told USA Today was a bit troubling.

"Thor: Ragnarok" just came out as the third "Thor" movie, and it was such a hit with fans and critics that "Thor 4" definitely seemed possible.

Hemsworth will be in "Avengers 3," aka "Infinity War," which opens this May. That was shot back-to-back with "Avengers 4," which opens next year. And then ... what, for Thor? Here's that part of Hemsworth's USA Today interview:

"Two days I ago, I was in Atlanta finishing Avengers in my Thor garb," says Hemsworth, with a satisfied air as he settles into a seat at the London Hotel. "It's really been two years of non-stop. I'm exhausted, but good."

There's also a sense of savoring the moment as Avengers' completion marks a possible end of Hemworth's run as the Norse god he has come to personify onscreen. His current Marvel contract is up with Avengers 4's release on May 3, 2019.

"Contractually, right now — yeah, this is it. I'm done. I won't be playing the character again," says Hemsworth.

"It's sort of a scary thought," he adds. "This really seemed like this never-ending thing. And now it's potentially finishing."

However, Hemsworth also said he and "Thor: Ragnarok" director Taika Waititi tossed around ideas for a fourth Thor movie. The sticking point may be the direction of the MCU itself, led by Marvel Studios boss Kevin Feige:

"(Feige) said, 'Look, we just have to concentrate on (Avengers) now,' " Hemsworth told USA Today. "So who knows? There are 76 cast in these two Avengers films. They will be the biggest films of all time, far bigger than my character. It's a conversation for further down the road, if it was going to happen."

It sounds like he'd be willing to return, if Marvel wants a "Thor 4" after everything else that's ahead in the next phase of the MCU. And also if fans demand more?

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