The longest part of the unlock will be getting your first character to level 80 and renown for the four major factions to level 4 to start The War Within campaign quests. If you are leveling and reading quests and taking your time, it could easily take 10 – 15 hours to get to that point. Luckily, you can complete most of the quest chains while leveling! Once you reach level 80, I plan on taking an hour and a half to three hours to finish the campaign.