Cool idea, although i think saying just because 10 people show that a 5v5 will actually take place with the state of the Beta at the moment, is a tad optimistic.
In the weeks of having the beta i have successfully played 2 games with other players. I wish a disclaimer was placed stating that Australian players are going to have to invest 5 hours a day to connect to a single game. Yes i understand this is a Beta, but this is beginning to feel like a MMORPG having to grind for hours to get something out of it and i can't even get any "testing" done.
I may be around at the time of this gathering but being from the other side of the world i will just lag the game and will be asked to leave / desync mid game / or hold everyone up for hours trying to connect. So i will just wish you all good luck with this gathering from afar.