What makes me wonder is if he is really only playing Wolverine once more, then what of both X-Men: Apocalypse and the 3rd James Mangold Wolverine stand alone film? Both movies have been already given release dates (May 27th, 2016 and March 3rd, 2017 respectively). Plus we've heard his thoughts on wanting to have a cameo in Ryan Reynolds' upcoming Deadpool film. So it sounds like he still likes playing the character, but perhaps contractual or age issues might be changing his mind. There's been a lot of changes in Marvel's comics recently and perhaps they will be bleeding into the film universe sooner than expected. What if it is health issues like his previous bouts with skin cancer? Then again, maybe Wolverine 3 has been simply cancelled. We'll have to wait and see.
This is a cryptic message indeed.