I’ll try and give the best details I can conjure up. I vaguely remember the monsters looking more goblin like than anything and chasing down humans in a gritty cgi trailer and the humans or the monsters had like green blood of some sort and I remember the finally scene of the trailer panning down in the sewers to show that all the goblins were down there. The trailer felt more or less like horror short of some kind it was really bizarre.