The French Dub of Trailer 2 has been added to the Justice League (2017) page. Similar to the Comic-Con trailer, only shorter – and French. I am not sure if it is just a one off like Universal’s 5.1 mix of the first trailer for The Mummy, but this French trailer from Warner Bros. contained the 5.1 mix. I suspect it is not necessarily a sign of things to come from Warner Bros., but one can hope!
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