The news comes courtesy of Trailer-Track, who say that the trailer runs for just over 2 minutes and 1 second. This would indicate that it will be unveiled in special Imax locations first, before being released in general public. This will be like Zack Snyder's Batman v Superman Dawn Of Justice Exlusive back in april of 2015. The Trailer for Transformers The Last Knight is exptected to be attached to Fantastic Beast And Wear To Find Them Or Rogue One A Star Wars Story which is Next Month. Since there is no release date it is difficult to say for sure.
In the mean while there is a new Behind the Scenes and a new look of Transformers The Last Knight that has been released of big explosions and car chases.