User blog comment:Jimeee/Hearthfire confirmed as the latest add-on. Official trailer./@comment-70.71.251.6-20120828182656

The reason why this is probably small is because of something big, companies usually do things like this to raise funds for something bigger. Not to mention working on PS3 Dawnguard. I wouldn't be surprised if only a handfull of developers worked on this while the rest are doing the third dlc. Expect the third dlc to be an expansion or atleast quite a bit bigger than Dawnguard.