User blog comment:Smoky000/Why Serana cannot be married/@comment-24.165.161.189-20130113183534/@comment-68.80.151.92-20130118014752

That's almost completely impossible in regards to a DLC's storyline, because what if someone buys that new DLC and not Dawnguard? DLCs have to have seperate storylines not connected to others for that very reason. It is possible, however, that Serana can become Marriable as a side-addition to a DLC, but it will not be directly in the main storyline