User blog comment:Hurry Mr. Frodo!/Threats/Antagonists/@comment-7971816-20141213125355

Threats is more vague. A threat can be (for example) mountain men. And an antagonist can be Cage/Dr. Tsing. An antagonist is a specific character usually, who interacts with the protagonists (Clarke, Abby,..) There's a direct connection, and they stand opposed one another. Another clear example is grounders (as a threat) and lexa as an antagonist.

That is the unofficial explenation behind both categories used. I don't recall the category guide by heart, but I think it should be in there... If not, let me know and i'll put it in :)

FYI : You might want to phrase this in a forum next time. Blogposts are harder to find for people who don't check the recent activity. Forums are usually a bit easier. Blog post are mainly used for sidenotes or fun trivia or something, not so much for wiki-related questions.