While Sony Pictures hasn't confirmed the casting of The Descendants' Shailene Woodley for the role of Mary Jane Watson in The Amazing Spider-Man 2, it seems to be the word around Hollywood that she's taken the part.
And with that, some information has leaked for her role in this planned trilogy. The actress will only have a very small part in the upcoming sequel. So small, in fact, you might even consider it a cameo. But Shailene Woodley will become the female lead in Sony's planned Part 3, a climax to this particular trilogy, with Mary Jane serving as the pathway to "The Death of Gwen Stacy" storyline.
Yes, they are going to kill off Emma Stone. But don't scream spoiler in my direction. This particular storyline is a part of the proper Spider-Man mythos, and most fans knew where this trilogy was heading the moment they heard Emma Stone had been cast.
It is unclear at this time if Marvel plans to reboot the series once again after Part 3, or if they will continue on with Andrew Garfield and Shailene Woodley in the leads for a second trilogy.