Those are rumor dates and text. Same source before trailer.
6/21/2013
"The suit will remain open-faced, and there will be no helmet at all. Norman(HARRY) will have green hair that is spiked high up. In his ears, he will be wearing a Bluetooth device"
Correct info. Open-faced, spiked hair, Bluetooth device.
6/29/2013
"Harry Osborn is Green Goblin."
"Electro calls the Oscorp Power Plant home in this sequel, and it serves as the source of his great electrically charged super powers."
Power Plant is the place where they fight. Look at Electro at picture. He is super charged, he can fly, shoot and transform. Clearly, more electrically charged = more powerful Electro is.
"Gwen's undoing, but as we've reported in the past, what looks to be the iconic death as seen in the comic book will actually be a fake out, with her actual demise coming later in the series."
Same clothes, same catch... but no dead.
Now let´s ask a question. How much we saw Gwen Stacy in trailer or filming scenes? There are 2 scenes.
1)Peter and Gwen Stacy scene in china town. This must be scene where Peter and Gwen Stacy meet and then Gwen Stacy is going to london.
Also we see that fighting scene takes place in night and we see scene where Spider-Man just saved Gwen Stacy from something?
She is ALIVE!!!
So, Gwen Stacy goes Oxford(then movie focus on Peter and Harry), then Gwen Stacy returns New York and suddenly dies? I don´t think Marc Webb is that stupid to waste Gwen Stacy.
11/26/2013
Cooper stated, "[Amazing] Spider-Man 2' was an introduction to Norman, and — you'll see — an extremely odd introduction, which apparently will lead to something more." He added that he's, "vaguely" aware" of Sinster Six future plans for Norman Osborn beyond the sequel and that he's been sent some material.
Clearly, Norman Osborn lead Sinister Six, becomes main Goblin.
Clearly Marc Webb wants Norman Osborn to becomes real MAIN GOBLIN who kills Gwen Stacy.
Clearly, Marc Webb wants to trick you guys.
So there you go!
Rumors:
Harry as Goblin - True
Goblin Spike hair - True
Electro and Power Plant - True
Gwen Stacy fake death - WE DON´T KNOW BUT IT MUST BE TRUE
Same source, same facts, same truth.
Rumor links:
http://www.comicbookmovie.com/fansites/USSENTERPRISE/news/?a=82445
http://www.comicbookmovie.com/fansites/notyetamovie/news/?a=82020
http://www.comicbookmovie.com/fansites/movienewsandreviews/news/?a=90555#DUpgOXZh6wUjl0DK.99