The official Guild Wars 2 trailer has finally been released on August 20, 2009. It has been long awaited since it's predecessor's last expansion was released. Guild Wars 2 is rumored to have many updates and to include several new enemies, such as dragon bosses.

No official word has been given as to the party system, but plenty has been given otherwise. You can read more at my personal Guild Wars 2 Trailer blog along with the actual trailer video in HD.