Yes, to je to ali vidi gore na vrhu:
A Battlegroup is a group of realms whose players can face each other in arena matches. Previously, battlegrounds and Dungeon Finder instances could only bring in players from the same battlegroup, but Blizzard has removed this restriction in US realms and is in the process of removing it elsewhere.
Koliko sam skužio sada možeš i u guildi imati ekipu sa raznih servera, ali samo spojenih servera.
Provjerim i javim!