There's a big old preview of Dawnguard on Kotaku detailing what to expect from this upcoming expansion for The Elder Scrolls V: Skyrim, saying it: "Sounds Like a Proper Old-School RPG Expansion." They came away from a conversation with Bethesda's Todd Howard with a load of information, all presented in easily digested bullets. Here are just a few points:

• The main quest has two different tracks, one for Vampire Lord and one for Dawnguard.
• Dawnguard will offer 10-20 hours of gameplay, depending on how you play.
• Even though the two story tracks are separate, they'll come together at various key points in the story. "Whatever the Macguffin is," Howard told me, "both sides come together around that point, and then it diverges afterwards.