Spaceport was always meant to be the proof of concept, not the finish line.
Now that the loot tracking format has settled down, the next two maps on the list are Chernarus for DayZ and Customs for Escape from Tarkov.
Both are in early data collection right now, which mostly means spending a lot of time in game logging spawn points, screenshotting containers, and cross-checking against what the community has already documented elsewhere.
Chernarus is the bigger undertaking by far given its size, so the plan is to ship it in sections rather than wait for full map coverage starting with the northern coastal towns, since that's where most new wipe activity happens.
No firm release date yet for either one. We'll post progress updates here as sections go from data collection to a published map, the same way Spaceport did.