We are indeed working on a second Adventure Path. I'm currently in the process of writing the outline, which we will supply to our authors. Things are still relatively fluid at this stage, and feedback from fans of the first series is enormously helpful.
Here are a few of our current working assumptions:
1) The Adventure Path will offer a "core" D&D experience. We've got lots of exciting plans for Eberron adventures in the future, but the Adventure Path will offer a "prototypical" D&D experience.
2) The Adventure Path will take a character from 1st to 20th level, probably over the course of 20 adventures published as close to consecutively as we can possibly manage. The magazine's format makes it almost impossible to publish the 30+ page behemoths that made up the first Adventure Path, so we'll probably slow down the pace a little bit. That means fewer meatgrinder dungeons that grant enough experience to jump two levels.
3) The first issue to include an adventure will probably also include an overview of the projected plot, suggesting which NPCs will play a critical role in the developing story. Because certain elements of that story might shift over the course of 20 adventures, we'll probably publish periodic plot updates and previews of the next five adventures or so, just to keep everyone up to speed.
4) We'll also publish "Backdrops," plug-and-play campaign locales for key locations. If we'd taken this tactic for the Shackled City Adventure Path, we might have provided Backdrops for Cauldron itself, the local region, Occipitus, and perhaps organizations like the Striders or the Chisel.
5) This time around, it'll be more like a traditional quest, with action spanning a larger area and more overland travel.
6) There will be undead. Oh, will there be undead.
--Erik Mona
Editor-in-Chief
Dungeon