And it depends on the specific contract signed between the parties.
Most of them are standard boilerplate, but some have some very interesting provisions and addenda. And none of us have seen any of the contracts.
If I were to guess [and that's exactly what I'm doing] I would say that the future of 2300 looks something like this [and remember that all of this depends on sales]. In no particular order:
- Atlases of each Arm
- Ground Forces Guide detailing the armies of the big powers, maybe with exemplar TO&Es for at least of few of them
- The Kaefer War, possibly in two books, a sourcebook which includes ground combat/resistance campaigning and a naval battles book
And after all this, again assuming sales support the work, we'll get to The Future [tm].