Do they divide the original campaign and this one OR, are they grouped together? i.e. is there "The Gathering" and "The Gathering Return" or just one "The Gathering?"

Considering there wasn't a lot of praise or complaining about the Zealot campaign dividers, I would imagine the scenarios would be grouped together

There is just "The Gathering"

Thank you all for the quick response.

On the other hand, if you get some 6x4" index cards, and halve them so they are 3x4", they fit perfectly well as additional dividers - it's what I've done with my Return to... box to keep the scenario stuff separate, as well as to allow me to store the various POD sets in there as well.