Zarhym, provoked by a pretty lame whine about two new Arenas and only one new BG in the next expansion, is expounding a little bit more on what Blizzard wants to do with World PvP and Lake Wintergrasp in Northrend. Ever since the zone was first announced, Blizzard has said they want to have it be the pinnacle of their world PvP experience, fixing all kinds of problems, from getting players involved to level imbalance to actual PvP rewards.
And Zarhym says it's still on track to do al that -- he specifically mentions that they've designed the battleground zone to supposedly be impervious to problems with realm imbalance, "trivial at the endgame," or "forgettable because of a lack of incentive." So if you hold a lot of faith in what Blizzard's working on, that would mean Wintergrasp is meant for 70s, has functionality that doesn't necessarily require a lot of players on both sides (siege vehicles come to mind), and will have an extensive rewards system (we've heard before that it may be token-based and equivalent to the level of current Arena gear).
If Blizzard is doing everything they promise to with Wintergrasp, it should be a sight to see for sure. A world PvP event that adds the permanency of the Auchindouin rewards with the mechanics of Halaa and the epic feeling of the old Southshore/Tarren Mill world PvP battles? We can't wait.