i suspect the reason they posted just the engine is twofold: 1) to let us all know they're not slowing down in spite of queuing up so many spectacular new releases, and 2) to get us doing exactly what we're doing now.
just about any A-H subject would delight me but my first choice would be an OEFFAG D.III, i'd need at least 3 (Arigi, Brumowski and Kiss).