The technology boom has done lots for movie studios who use CGI and hi-tech filming equipment to shoot scenes which previous filmmakers couldn’t even have dreamed of. However, that same tech also hurts studios as fans use their own devices to secretly record movie trailers at events like San Diego Comic Con. This year, though, it looks like some new technology will prevent sneaky fans from recording illegal videos in Hall H.

While there’s no details on what this new tech could be, director James Gunn casually mentioned its existence in the comment section of one of his many Facebook posts. Yesterday, Gunn posted an old photo of himself on the set of Guardians of the Galaxy Vol. 2 with Chris Pratt. The director posted the photo with short message overlaid on top of it in blocky orange letters, reading: “300 Days Until GotG Vol 2.”

However, in the comments, Gunn let it slip that SDCC would be using new tech this year to combat camera-friendly fans. When a fan asked Gunn if he knew when his film’s teaser trailer would be released, Gunn wrote, “Well, you might see something if you're in Hall H on July 23 with me and the Marvel panel. Or if someone secretly films that - which is less likely to happen because of new technology, but I still know sometimes happens - then you'll see it right after. If not then, it will be a short while.”

Gunn then explained the teaser's official delay was due to unfinished VFX, but even without those graphics, Marvel Studios is ready to tease video during its SDCC stage. However, fans attending the presentation in Hall H shouldn’t expect to get footage of the film’s trailer should it pop up as planned. The convention’s panels will be loaded with security who’re on the lookout for filming fans, and even if they could grab video of the sneak-peek, this tech might somehow make it unwatchable.

Fans are already speculating about what the tech might do. For instance, will it scramble the video images? Distort color or sound? At the moment, no one except for the convention itself knows what the new technology will be doing to protect exclusive movie trailers from SDCC attendees.

One thing is for sure, though: If fans can't film, they better be taking good notes. If they can’t grab any video, they’ll want to make sure they can write some detailed descriptions about whatever trailers they do see.