I'm sure you know by now that Sony pulled the Spidey movie trailer from the 'net because it featured Spidey webbing a helicopter between the twin World Trade Centre towers.
You might also be interested to know that this poster was also pulled (but not before this was used as a cover photo on Comic Buyers Guide). If you look at the detailed version, you'll see the twin towers reflected in Spidey's eyes.
Clearly, when Sony thought of Spidey, they thought of Manhattan... and when they thought of Manhattan, it was the towers which leapt to mind.