Well the new DLC takes place ~200 years after Brytenwalda, so it wouldn't make sense to have Cyning Jeolfric still alive and well at the helm of his empire lol He would of course be long dead, so importing him to Viking Conquest wouldn't make sense.
I was thinking something that could modify VC's world to incorporate political changes from Byrtenwalda. If I conquer and unite all of Brittania, I would sleep well knowing my lineage maintains peace (and rule) for the next couple centuries.