Mary Jane Been Cast For "The Amazing Spider-Man 2 &3"

It's been announced that "Descendants" star, Shailene Woodley has joined the cast of "The Amazing Spider-Man 2" as the new rebooted version of Mary-Jane Watson. It's been reported that she will appear in a cameo near the end of the second film before becoming lead female in the third. I think she is stunning looking and would be great for the part.
Rumours came out a few weeks back saying that Emma Stone's Gwen Stacy was set to be killed off during the next film, but nothing was confirmed. It's still not been confirmed if she will be killed off in the second one or be kept to die at the beginning of the third. Stacy is killed by the Green Goblin in the comic books, so that could be kept for the third and final film in the rebooted trilogy.
This is my theory because Electro is strongly rumoured to the the second films main villain, but it's also rumoured that Norman Osborn will pop up too to kick things off for Stacy's death, which I'm seriously guessing is the third film.