I built this arena in about a day with the help of world edit for single player.  The outside of the arena is one of my own ideas while the inside was strongly influenced by The Staples Center.  Inside features an in-ground lower bowl with a 1:1 NHL scale hockey rink, with team benches and their own tunnels for each team that connect and have a small storage room along with a home locker room with most of the Los Angles Kings roster's names above their stalls, with somewhat their team logo on the rug.  Above the lower bowl are three seating rows which you inter the lower bowl through. above them there are 3 massive floors with an amazing view of the rink which are accessible through 7 sets of stairs located arounf the arena.  Finally there's another seating bowl on the top with entrances, but no stairs to them (easy fix) .  I then added an arched roof with 6 sets of lights, scoreboard, and 2 natural sky lights on each end of the arena.  Center of arena can easily be swapped out with another type of playing sports field if you wish.  Arena is clean and clear enough itself that you can modify and add your touches any way you'd like.