Avengers: Infinity War Trailer - 11 Major Plot Reveals

6. Thanos' Invasion Of Earth

It wasn't exactly a secret, since he had to come to Earth eventually (and it's the plot of the movie), but the trailer does give us a good look at Thanos' invasion of Earth. For starters there's a glimpse of what appears to be his spaceship - though it could also be something he uses as a portal for travelling around - at the same time as Peter's Spidey-sense tingles.

Later we see Thanos himself emerge through a portal, lending some credence to that notion of how he gets around Earth, and then there are some bigger shots of his whole Black Order, which will be keeping the superheroes busy and hunting around for the Infinity Stones.