Spoilers for Amazing Spider-Man 2 follow.
Arguably one of the best things about Amazing Spider-Man 2 was the performances of Andrew Garfield and Emma Stone, albeit their screen time together may have been a bit too much for my tastes. As seen at the conclusion of the movie, Spider-Man is battling the Green Goblin where Gwen Stacy falls with Peter not able to catch her in time leading to her death. We see her funeral, and Gwen is even buried.
As it is a comic book movie, dead doesn't necessarily mean "dead." Could Emma Stone return as Gwen Stacy in subsequent sequels?
It might be a stretch, but in the following video Emma Stone teases that she might not be done with Spider-Man just yet.
Emma Stone mentions "there is a whole plot line that could happen that may bring her back."
Fans of the Marvel Comics will know that Jackal brought back Gwen Stacy as a clone.