From then on, it's mostly about raw content. The third phase will introduce Alterac Valley and Warsong Gulch, while the fourth phase will add Arathi Basin. Blizzard isn't changing PvP with the fifth round of WoW Classic updates, but the sixth phase will bring world PvP objectives in the Eastern Plaguelands and Silithus.

There's just one problem: Blizzard hasn't nailed down the timing for these phases. It's unclear just how long you'll have with a given phase before things move on. If nothing else, though, you'll know just how carefully you should watch your back when Classic arrives in earnest.