The final Justice League trailer is rumored to debut at New York Comic Con, which is taking place on October 5-8th in New York City. The trailer is being said to be debuting sometime on Saturday, October 7th.
Warner Bros. nor anyone attached to the film have officially confirmed this news, but we believe it’s likely to happen, as the film releases a little over a month afterwards on November 17th and a final trailer being debut during one of the bigger comic con convention doesn’t seem unheard of.
We’ll just have to wait and see if an official annoucement is released regarding this news, but as of right now, take it with a grain of salt.
— DC Extended Universe (@DCEUniverse) September 8, 2017