True about borrowing the chords. There are not enough chord combinations in music for every composer to come along and choose his own. Plus, there are certain chords that work the best with action movies and other chords that work the best in chick flicks. Besides, it's not really anyone's chord to begin with. It's just something a composer used in a piece, and guess what...the piece became really big and everyone noticed that chord in conjunction with some other musicla aspect. Then, another composer comes along and uses the same chord, on purpose or not, but doesn't use it with the same musical tool as the previous composer. However, we keyed in on the chord and what is our first reaction? We think, "oh, that's familiar." Then we think back to where we heard it first. In some cases the composer works under another composer, as Jablonsky does with Zimmer, and in other cases the previous composer died before the new composer was even born. I believe we tend to pay more attention to chords coming from the most previous composers because, logically, that's the most recent thing that we've heard that chord in. In reality, that previous composer most likely borrowed in from another composer who also borrowed it from a composer.
To say that Jablonsky used Zimmer's chord tones might be correct to an extent, but not to great. Jablonsky studies under Zimmer so he hears Zimmer's music a bunch. It's only natural that he's going to have a chord or two that sounds like Zimmer's chords. Did he mean for parts of Transformers to sound like Terminator or The Rock? Probably not. The mission for the composer of a movie score is to create something that has it's own identity; something the audience can listen to and think, when they hear it, that's Transformers...or whatever score it is. I believe I have already said it in this thread about chords having distinct sounds and timbre to them that make them perfect for certain moods of the movie. Search back a couple pages if you're really interested. Anyways...
I didn't really mind the pieces sounding like they did. It was different enough from Pirates of the Caribbean and the Rock, even though Jablonsky works in Zimmer's Studio, that they sounded like separate scores. Just stuff to think about.
Good points Jack Sparrow789 and HolyHappiness!!! Do y'all do music?