Justice League Comic-Con 2016 Footage
This footage was prepared by the filmmakers as a special look for fans in attendance at Comic-Con® 2016. This is listed several places on Youtube as a “trailer”, but clearly it’s not.
Justice League is expected in theaters November 2017.
If you really want to dig into the details in a fun way, here’s a great breakdown from Filup and Erik at the New Rockstars youtube channel.