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Romeo confirmed that the world will come with 3 different neighborhoods – with each neighborhood bringing 4 new lots.
If you were wondering if any of the lots will be a 64×64 sized lot, the answer is yes.
Romeo has also confirmed that each lot will will start with the “Wild Fox Challenge” enabled, which allows wild fox to roam the lot. You will be able to disable this feature, and Maxis will be releasing additional details on this function soon.