Ok, so I was browsing around creationkit.com, and found something on this page: http://www.creationkit.com/Bethesda_Tutorial_Planning_the_Quest
Check out the object window, at the top.
You can see things like: "ArenaCombatQuest05Bear"
Removed feature, or future content?
ooo...good eye. I would think 'screwin around with co-workers' type stuff. I'm sure they have arena type combats during lunch breaks. ha! Also Bethesda's real tight on info being release. If anything, they're doing this on purpose, just for this reason I'm typing right now.