How's the single player content in Retold?

I'm considering buying the game but the part I liked the most of the original were the campaigns. e.g not too interested in new gods if they don't include long campaigns.

My understanding from looking at the wiki is that Retold basically adds no new campaigns? Anyone know if there are any plans for new DLCs to add large campaigns? Or, are there enough changes in the old campaigns to justifiy replaying them?