Everything not in the book is going on the website for free. That includes, but is not limited too....
1. Rules for Ground Defenses
2. Making Forces for Regional Powers (Such as Chile, China, etc.)
3. A ship class or two from each Great Power (Such as additional Battleship, cruiser, or escort classes)
4. My designer's notes
With this we probably could have filled another 10- 15 Osprey pages of material.
The core of the game is all there, as there are still rules for bombardments, bombing runs, and other air-to-ground actions. The campaign rules even made it back in with the extra space. The fleet lists for 9 or so Great Powers (Britain, France, German, Austro-Hungary, Russia, Italy, Ottomans, US, and Japan), and the 10 or so scenarios take up a lot of space!
The full page art is still in, because it is all unique to this book. No reprints from elsewhere! Also, the pictures of Brigade models are all new images taken just for this book too! Thanks to Osprey and Brigade for all this new content!