ultimate juggernaut is a 'mutant' of the wepon x program with superstrength and durability, not just a guy who got powers from cyttorak and in ultimate x-men Twelve i think they had gambit charge the gem and juggernaut absorbed it or something in a fight, trying to put in his connecting with the cytorak gem and he says after he feels better than ever. I say i think because i only got to skim it, haven't bought that one yet.