I thought Faceoff was classified
Well that month was originally Map Mission Classified.
It ended up being Map Mission Mission Faceoff Faceoff.
And Classified originally took up 1 drop on the calendar, and Faceoff took up 2.
Idk I guess you can consider it a classified if you want.
The other 2 classifieds have turned out to be nothing however.
I think they were meant to be campaign DLCs or something. Fourzerotwo mentioned them in Cod Elite promotions early on. They were also mentioned in pre-release livestreams. Then Mark Rubin answered a tweet a few days ago saying they were planning on doing Campaign DLC at first but then realized it wasn't a good idea and what they had in mind wasn't going to work out, and considering they never updated the calendar since November, it could make sense if they were story extensions.
Another theory is that they had Gamemodes listed on the content calendar at one point instead of classified, so they could've originally had Infected/Dropzone etc.. in their mind as a DLC only thing, but then decided to do it for free and add the playlists, but never updated the calendar. Here is Bowling saying what they can use Call of Duty Elite for:
Robert Bowling Pre-release Interview said:
“…We’ll be using that information to introduce even more game modes and playlists to players"
The more I think about it, the gamemode theory makes more sense now. Who knows what this last classified will be now though :S