Sounds kind of blah. I was scratching my head, wondering how they came up with this name, when I saw some guy's Tweet in the linked Twitchy post, in which he stated they just replaced "In-" with "Guar". Makes as much sense as anything else, I suppose.
Update Friend and commenter Gregory, in the comments: "I saw that Guardian was the brand name of a prophylactic. They could wear them on their heads instead of helmets.I know that would make them look like a bunch of... But let's face it. They already are."