By their very nature, these Amazing Spider-Man set images are spoilers. Or, to look at it another way, they’re not spoilers at all. It all depends on perspective, I guess – are you at ground level, or sitting on top of a lifetime of well-read Spider-Man comics?*
I suppose this is our first real indication that the filmmakers haven’t monkeyed around too drastically with this key piece of continuity.
*Kneeling on top of the first Sam Raimi film would get you high enough also.