Storm King's Thunder
The year is 1491 DR, and things are not right. The people of the North thought that they would be able to have a little peace & quiet, for at least a moment, after the defeat of the Cult of the Dragon, but it appears not.
For the last year, the weather has been unusually harsh. No one knows why. Disruption of trade is a growing problem, with random vague reports of raiders riding flying mounts. And now people are starting to report sightings of flying castles admidst the clouds. What does it all mean? No one is certain, so anxiety across the North grows.
It may be a time for heroes, it may not. The only thing that is certain is that the summer promises to be very uncomfortable.