Jackman, 47, also revealed that the filming has wrapped and director Jim Mangold is busy editing the movie.
"We've finished shooting. I just saw Jim Mangold today. He's editing away and finishing that," the Logan depicter told Entertainment Tonight.
"There's going to be some stuff coming out in the next week or so. That's all I'll say. I'm not good. I'm the kind of person who tells everybody everything. Basically, it's going to be very different. Very different in tone and hopefully different to anything we've done."
It will be set in the future, where supervillains have taken control over the world.
Patrick Stewart is back to reprise his role as Charles Xavier aka Professor X in the third "Wolverine" film.
Set to hit US theatres on March 3, 2017, it also stars Boyd Holbrook, Richard E Grant, Stephen Merchant and Elise Neal.