After doing a little more research into my own question I found that apparently this can be purchased from the "Arena Organizers"

They are goblins in Tuxedos. One is located in Nagrand at the arena there, one in Blade's Edge at the arena there and one in Gadgetzan at the Thunderdome arena there.

The charters will be purchasable in ~5 hours from the time of this post.

Costs:
2v2 Team Charter: 80G
3v3 Team Charter: 120G
5v5 Team Charter 200G

These prices are speculative and I have no real way to confirm.

Комментарий от Nawkaga

You need the amount of people equal to your bracket to sign, ala Guild Charter (eg. 3 people for 3v3, 5 people for 5v5).

Комментарий от 17488

Just as with a guild charter, you have the option of renaming your team until you turn in the charter.

Комментарий от Milca

you have to return your charter back to the registrar to form the team

Комментарий от Aisenfaire

Purchasable from:

1. "King" Dond - 65, 59 in Nagrand (http://www.wowhead.com/?npc=18897)

2. Steamwheedle Sam - 52, 41 in Blade's Edge (http://www.wowhead.com/?npc=19856)

3. Bip Nigstrom - 51, 27 in Tanaris (http://www.wowhead.com/?npc=19861)

Upon purchase of the charter, you'll need to design a team logo and create a team name, have your teammates sign it, then turn it back in to any of the 3 NPCs who sell it (listed above).

Then invite your teammates to a group, let the group leader queue up at the arena battlemaster (goblin at any arena or at the BG queueing area), and you're all set. Happy PVPing!

*Maximum members you can have in a 5v5 team = 10 characters. Minimum is 5, of course.
I would assume the maximum for a 2v2 would be 4, and a 3v3 would be 6, then. (Need confirmation on this, as I only know the 5v5 one from experience.)

Комментарий от 158969

if u got a arena charter in ur bag and u join a arena team the charter is not destroyed

Комментарий от Shroud

With patch 4.0.1 a new way to create Arena Teams was introduced. The Arena Organizers have been removed and you no longer need to purchase a charter.

Simply open your PvP window (H by default), and click on Arena teams. You can create a 2v2, 3v3 or 5v5 from there.

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