Unfortunately, we're used to being fooled by fake images and the like, especially as fans get smarter with the sort of technology they utilise to create them. Well, while you might discount the photo below as being bogus, there's a lot of evidence to suggest that this is indeed our first look at pre-vis footage of Doctor Strange (Benedict Cumberbatch) and Spider-Man (Tom Holland) in Avengers: Infinity War.
The name on the monitor is Jesse Olivares, a video assist engineer who has worked on a variety of Marvel Studios projects. He's listed as the key video assist engineer on Avengers: Infinity War too.
The scene in question features the Sorcerer Supreme telling the wall-crawler, "Peter! Protect them. They're not dead." Could he be talking about members of The Avengers or civilians? And how does he learn that Peter Parker is Spider-Man? Those are questions only Avengers: Infinity War can answer and we'll hopefully see a whole lot more from the movie over the next few days thanks to Comic-Con!