User blog comment:Simran bajaj/will edward and bella die in breaking dawn part-2/@comment-4220399-20121120225116/@comment-81.11.235.166-20121121101938

She didn't show that vision to see what happens to Jasper if Jane attacks him and such. She warns him with that vision that, if he plans to continue with his plan to kill the coven and recruit Alice and Edward (and now possibly Bella), he will die. And since Aro is quite attached to his bloodsucking immortal life he changes his plans and leaves.