Following Skoda with it new Octavia, the new Jetta seems to be much larger than the existing model, and likely to hit close to 4.7m in length.
Design wise, I am seeing hints of Audi (headlight), Honda (grille) Ford (C pillar) and Hyundai (taillight). Hopefully the car look better in metal, just like the current B8 Passat. Photos were rumored to be taken at VW Mexico manufacturing facilities.
In case you still don't believe this is the new Jetta, but some other VW model for Brazil or China, here are some spy shots of the new Jetta taken earlier.