So there have been numerous threads discussing the viability of Norse paganism surviving or reforming itself. I guess I just wanted to discuss the opposite, as the thread says.
How early could the Norse be converted, both as a whole and the individual nations? Denmark could obviously be converted far earlier than Sweden.
One scenario that I immediately considered was the alliance between Widukind/Saxony with Denmark against Charlemagne discussed in the other thread to resist Charlemagne backfires. Charlemagne proves victorious, and gives Denmark the Saxon treatment. So Denmark could conceivably be Christianized in the early 800's.