Something is 100% happening at SDCC. But you never know, maybe it'll be exclusive to those in attendance. 5 months out from a release is a good time to put out a trailer though. And it could very well be a main trailer with a shorter final trailer later just before the release date. Considering how well PREY did after premiering there and how well Killer of Killers seems to be doing, SDCC could also be something of a victory lap for the franchise.