So the last few unclassified parts of Battle World are to be revealed this week. From articles I've read, I think just about every region and associated book is known.
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The three classified areas of the map are 6, 14, and 19 on the image above. This article has some speculation on what might be in store for those areas, as well as a summary of titles announced to date.
http://comicsalliance.com/battleworl...et-wars-clues/