In a post yesterday on the Star Wars: The Old Republic forums, it was revealed that attendees at GamesCom would be able for the first time play in a special PvP Warzone. SWTOR will have a special area in their booth where players will be able to play Warzone matches away from the crowds. The room can hold 16 players at a time, 8 Republic and 8 Imperial combatants in the Alderaan Civil War.
If you’re attending the event and want to get you hands on the SWTOR PvP action, then you’ll need to sign up. Instructions on how to sign up are listed in the STWOR forum post.