Benoit Berthe, 3D Artist, wrote on his LinkedIn profile that he’s currently working on The Sims 4 Trailer in a 3D animations studio called Nexus.
This means that the previous studio who created The Sims 4 Arrival Trailer, DraftFCB, was replaced with the Nexus studio.
Below you can see a Coca-Cola Advertisement, made by Smith & Foulkes (Alan Smith and Adam Foulkes), film makers of short movies and multi-award winning advertisements, who are also working on the new Sims 4 trailer.
Source: Rincon Del Simmer