User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-74.134.148.245-20130315235052/@comment-24.5.218.93-20130316042319

Note that Bethesda said they would be focusing primarily on larger DLC. Hearthfire doesn't entirely count as a DLC and is more like an afterthought they had. We can expect at least one more DLC after Redguard.