On Location Vacations, a website dedicated to keeping track of principal photography of major movies, says that they have spotted E7 Directional Signs over S Olive St and Venice Blvd in Los Angeles.
The site mentions that Transformers: Age Of Extinction reshoots maybe taking place.
For those who want to know about what these “E7 Boards” are, they are Directional Sign Boards marking Transformers Movies being filmed in a certain area. E71 refers to the first Michal Bay Transformers Live Action Movie and E72, E73 and E74 refers to Transformers: Revenge Of The Fallen, Transformers: Dark Of The Moon and Transformers: Age Of Extinction respectively.
We will keep you updated as we hear more.