AbdulAlhazred
Legend
The most simple thing would be to produce each of the three possible products, the consume one possibly online.
Well, the implications of digital material on what the role of printed material is is a whole other, but relevant, question. I guess I'd suspect at this point that we're not far enough along that path to have core books that aren't containing all of the core material, and there are still many people who won't touch anything that isn't printed on a dead tree. Even so, it seems like there's a bit less need to make the book entirely encyclopedic when it comes to rules material. DDI is an excellent reference.