Warsong Gulch and Alterac Valley have been part of World of Warcraft
since way back in June 2005 (patch 1.5). That's given us all plenty of time to play both of those battlegrounds until we know every inch of the map by heart and could capture the flag (or, in the case of AV, the bunkers/graveyards/etc) with our eyes closed. Arathi Basin is a bit newer than that, released with patch 1.7 in September 2005, but by now, even its most dedicated fans have had a chance to play it to death. And even the most recent battleground, Eye of the Storm, has been in the game for nearly seven months. Doesn't running the same maps endlessly get old at some point? And doesn't the battleground system deserve a little love?
Well, Nethaera lets us know that there are more battlegrounds in our future
(though she can't tell us precisely when), but that Blizzard is concerned about longer queue times that could result from giving players wanting to participate in the battlegrounds a fifth choice. For my part, I think even some new maps for the existing battlegrounds could liven them up some.