Say what you will about Michael Bay, but he is a filmmaker who knows how to maximize the bang for the buck. He is often criticized for using too much product placement, which gives him millions of dollars more to play with than he would have otherwise had access to. so you can’t really blame the guy for re-using footage from one in another, more particularly the guys has used some footage from 2005 “The Island” and reuse it in Transformers 3 Dark of the moon.
Filmmakers often use stock footage to save money from traveling to capture an exterior of a city, house or location. Its a very common occurrence which you likely never notice. Bay has used stock footage in most of films, sometimes borrowing shots from his earlier movies . Watch the clip below which shows that Bay recycled shots from an action sequence from The Island in Transformers: Dark of the Moon:via /Film]