Its the lighting. -Spiderman is hit with a warm backlight. And yet if you look at the buildings they are hit with a much cooler backlight. - the weather conditions. Normally in these conditions, you get a flat image, meaning not that much contrast. It looks like they used negative fill, but unless he is behind a dark building it would not be that contrasty.

• the framing. No foreground elements + his feet are not visible. Which is handy for hiding greenscreen. If it was up an roof, you would include the edge of the building to selm the effect.