Ok, well since you can't really draw the arena map that I want to submit, I'll try to give some really good descriptions.
The starting area is similar to the Dalaran Arena, but instead of the tube being horizontal it is vertical. The tubes will look like the tubes in Netherstorm going into the Manaforges. When the arena starts, the floor drops out, however, there will not be a floor, you will be held in my another force. In other words, you'll just be standing there until the arena starts. When you drop into the arena you'll be 40 yards apart so the other team, or your team, will be out of range of the other team so you cannot use abilities on them.
The arena will be like the Ring of Valor, as in line of sight that comes up and down. However, the arena will be anti-gravity (like whichever phase it is in the Kael'Thas fight). With the arena being anti-gravity you will have the ability to move in every direction. The random factor in this arena is that chunks of rock will be falling from the top. Five rocks will drop at each interval. These rocks will provide LoS. The rocks will fall about every 15 seconds, but will only last for 10 seconds, so there will be a time frame of 5 seconds where there will not be LoS. The rocks fall randomly through out the arena. They will not do any damage if you happen to be near one or be hit by one. In the event that a rock falls on you, you will just be pushed 5 yards backwards from where you were in relation to where the rock is to you. The arena will be split into 5 sections vertically. In one of these sections one rock fall down at a random location.
Size of the arena:
The arena will be a tube (like the one you started in) with a diameter of 60 yards, and a height of 100 yards. The height of each section (section referring to where one rock can spawn) is approximately 20 yards each.
Scenery of the arena:
The scenery will be a texture of the Netherstorm sky, the Hellfire Peninsula sky, or the room in which you engage Algalon (after the floor disappears).