Okay... They're not going to kill Gwen. It's pretty obvious.
If they don't establish MJ in this one as the "true" love of Peter's life, with Gwen as a stop-gap, it ain't happening. And definitely not in the second film either way.
The photos shown presnt what looks like a funeral procession, which is likely for Gwen's dad. If the film ends that way, the second film will be about the two of them getting together, and sure as hell won't end with Gwen dying.
TDK can't be used as a measuring stick. For one thing because the story had serious structural problems. But also, Bruce Wayne is an extremely different character from Peter Parker. Spider-Man is a serious hindrance to Peter's life. But Bruce Wayne has no life aside from being Batman. Bruce Wayne's relationship with Rachel wasn't a love, but a wish fulfillment. Peter's realtionship with Gwen is something else altogether.
Further, Peter's relationship with MJ isn't a foregone conclusion. Marvel has been trying to end it for nearly ternty years, and finally have. So there's no reason to expect them to continue it in the rebooted movies. Especially if Gwen is presented as a likeable character that audiences respond to. They even intended to resurrect Gwen in the comics with OMD- and if this film proves successful, they may go ahead with that.