Hi, I'm currently working on getting set up for NG+ runs, and am wondering if a NG+ category will be added?

At this point in time, there are no plans on adding additional categories such as NG+. This might change in the future. However, even if it does, new categories would have to be reviewed in their value, as in what benefits there would be from having this category, the community's interest, the concept of the run, etc.

We've done the mistake of loosely adding new categories before on previous games of the series. Basically all of those categories ended up as 1-run "categories" and never had anyone compete for it. The goal is to avoid something like that from happening again.

Ok, that's understandable.