Seeing as we get more and more battlegrounds added, I wondered what possible BG scenarious exist? how many (relatively) unque BGs we may have?
as for now, I've found these scenarios:
Domination v1: must capture one or more objectives and hold them for a certain amount of time (Arathi Basin, Battle for Gilneas)
Domination v2: must capture sevaral objectives and control them both simultaneously (Khaine's Embrace in WAR)
Deathmatch v1: just kill all opposing players (Gurubashi Catacombs, modern Arena)
Deathmatch v2: each side has a number of reinforcements; combat ends when one side runs out of reinforcements. Often combined with Domination-like objectives, in order to regenerate reinforcements (Alterac Valley, Isle of Conquest)
Capture the Flag: a flag must be acptured certain amount of times in order to win (Warsong Gulch)
Defense: prevent the enemy from reaching certain objective for a certain amount of time (Strand of the Ancients, Lake Wintergrasp)
King of the Hill: capture the flag at center and take that flag to diffrent minor objectives (seen in WAR)
Murderball: capture a certain object and keep enemy players from getting it for a certain amount of time. The object deals damage over time to the carrier.
+combinations of above mentioned scenarios.
What other Battleground scenarios can you think of / do you know of?