For those of you who've decided to stay... well, this could be much ado about nothing, or confirmation that Gwen Stacy won't be appearing in THE AMAZING SPIDER-MAN 3. Here's the evidence provided by SHH and Slashfilm:
Behold, the lovely Emma Stone as Gwen Stacy!
That outfit looks familiar right?
That's 'cuz we're all very familiar with a version of it from the comics.
Misdirection or dead giveaway? You make the call.