The rules were ready and we saw no reason to delay, especially as, with more and more people having to stay away from large gatherings across the world, it seemed right to get this into people's hands now.
The print version will be a little longer but, in this respect, the current state of affairs might work in your favour because the holiday I was expecting to take to Japan looks less and less likely to happen every passing day, which means I'll be in a position to get the print version onto the market sooner than I had expected.
I will continue to work on new material for Zero Dark through the Patreon campaign, where patrons will have exclusive and early access to new stuff. However, I will also be producing some new How To Play videos to support anyone interested in the rules.