Not really a DLC though.
It was said that the map has been shrunk in order to force interactions between players. Whether that only means murder is irrelevant but still needs to be pointed out.
It was also said that special resources were expected to create a constant conflict between factions.
With that in mind, a thought for the future: how about regularly expanding the map on one direction at a time, with one or two new biomes, which would spawn different, rarer, and unique forageables, thus expecting a bit of the new world rush without the annoyance of a full reset?
New special animals such as the mammoth could be restricted to those new biomes as well. And it would be even more interesting if you separated those new lands by water and added a third tier of water tile (stormy water), which could only be crossed by knarrs.