"Wolverine... One last time," Jackman, 46, captioned a photo of his fists, clutching the claws of his famous mutant character.
While bloggers and social media users debated the actor's meaning, an individual familiar with the situation said that he was referring to a planned sequel of the 2013 standalone hit "The Wolverine", reported TheWrap.
The character could feasibly appear in Bryan Singer's forthcoming ensemble "X-Men: Apocalypse" or in Ryan Reynolds' spin-off "Deadpool", but the insider said Jackman is pointing to the forthcoming follow-up that also has director James Mangold returning.
Jackman made his debut as Wolverine in 2000's "X-Men" and is arguably the franchise's biggest star.
He has played the character six times thus far, most recently in "X-Men: Days of Future Past" alongside Jennifer Lawrence, Michael Fassbender and James McAvoy.