It was in Windhelm, not Whiterun.
Arthmoor restored some cut content in http://www.nexusmods.com/skyrim/mods/47327/?
ThirteenOranges added a functional arena in http://steamcommunity.com/id/ThirteenOranges/myworkshopfiles/?appid=72850&p=1 Faction: Pit Fighter.
There was suppose to be an arena in Windhelm. But I doubt there going to restore that. The remaster will basically be the same game but with better graphics. There is a mod for PC that restores the arena.
If we received $1 for every time we will have to repeat this, between now and October, we could probably afford to purchase Bethesda, by the time it's all said and done.
Don't think so small, I think we could afford Microsoft.