You guys have to keep in mind, that just because something is in the game files doesn't mean that the game actually uses it. All of these titles are most likely obsolete.
I was updating the PvP article in the wiki a few days ago, and noted all of the datamined arena map names. As we've recently learned that there are only 2 working maps and that the devs really haven't done any work on pvp since last year's blizzcon, that certainly goes to underline Hardrock's point. Lots of stuff gets thrown into the game files during development, often just to stake out space and to be fleshed out later. If at all.