User blog comment:Gh0stCrawler/Skyrim DLC Idea/@comment-4715278-20120812132146

But, what if you hadn't completed the main questline or the Stormcloak/Imperial questline?

That would ruin the DLC straight away, in my opinion it should be the Dragonborn convincing each Jarl (by helping them out with a problem) to support Ulfric/Elisif.