» Wed Dec 14, 2011 3:00 pm
I don't think this is exactly what you are asking for but...
Kvatch Rising, once that city has been fully restored, sports an arena whose sole purpose is trials-by-combat of Mythic Dawn agents captured at the end of the Oblivion Crisis. This of course means you will have needed to complete the game's main quest, and the mod requires a resource pack you might not want to invest in.
On the one hand, I find its vision of rebuilt Kvatch more interesting that Kvatch Rebuilt. On the other, I prefer the actual rebuilding phases of Katch Rebuilt.
Bartholm also sports an arena, just outside the city. As I recall, its combat is confined to fights against animals.
-Decrepit-