You know... as I'm reading this thread, a horrible thought came to mind.
What if Gwen never really died in the first place (ala Norman), and somehow simply went into hiding somewhere because she had to get away from all that Spider-Man craziness in her life (ie, Spidey responsible for her father's death, the Green Goblin attack, Pete's weird relationship with Spidey via the photos, etc...) She just needed to move on and sacrificed her love of Pete because the Spectre of Spider-Man was simply too much for her mind to handle. So she just goes away.
So here we are... about 7 years later after her "death", Pete reveals himself to be Spider-Man on television.
If she were indeed "still alive" living incognito, that revelation alone might bring her back to confront him.
Of course, Marvel would have to explain how she survived her "death".