This was posted just two hours ago (as I was driving to work):
— Empire Magazine (@empiremagazine) April 16, 2018
Yes, that is Mandalorian armor behind Bettany, but the post does nothing to explain the context of the shot.
Here’s their tease:
It wouldn’t be wise to totally trust any character Han meets in the upcoming adventure, but the one to certainly keep an eye on is Dryden Vos — a slick and scary gangster played by Paul Bettany. The character has been hidden away from much of the promo material for the film, but we’ve got a brand new look at him right here, as seen in the forthcoming issue of Empire.
Click on the link above for the full piece.