When Bleeding Cool first ran the image, this member of The Worthy was labelled Juggernaut. And it sure looked it. But it was otherwise teased as Colossus taking the helmet.
Well, from this Marvel teaser, he may well have taken said helmet, and the ruby that goes with it, in order to take on the worthified Juggernaut!
Uncanny X-Men #543 by Kieron Gillen and Greg Land is published in September.