The new Season Pass will launch alongside the release of Minecraft Dungeons' upcoming DLC, Howling Peaks, on December 9th. Although the current Season Pass included all of the existing DLC's up until now, the second Season Pass will consist of the new Howling Peaks expansion and the next three after that.
The Howling Peaks expansion will bring new areas, weapons, quests, enemies, and more to the game, much like each of the previous expansions. With the release of cross-play, you can now enjoy the upcoming expansion with others on different platforms than the one you currently play on.
Along with the new DLC release, Minecraft Dungeons will also be releasing free content for all of those who own the game. This content will be in the form of six free enchantments that have "the potential to totally change the way you play the game!"