We've had a whole bunch of information revealed about Logan in daily Instagram and Twitter releases of photos recently. Yesterday we saw Stephen Merchant as Caliban, and we have yet another big reveal today.
This time the image comes from the official Instagram account, with a photo having the caption 'Reaver'. There had already been a lot of hints towards this in the past with The Reavers thought to be the main villain in the films for some time. This was helped by an image of Boyd Holbrook more or less being confirmed to play Donald Pierce via another photo release. I think it is safe to say this more or less confirms it.
It's a really neat photo too.
Take a look: