The lack of design specs or images of the Tesla sedan appears to be intentional.

 Since a sedan is a very special kind of car we should expect to see a car inspired by

 the Tesla Model Y which also resembles a Nissan Leaf or VW ID. 

 Its also reasonable to expect that most of Teslas standard services will be included in 

 the new sedan including access to the companys infotainment system 

compressor network and more. Elon Musk has promised

 the car will be fully self-driving so one

thing we can be sure of is that it will use some

kind of autopilot. We highly doubt it

 will have a level 5 range like a car.