I've predicted her path since early S1. Now that Jenna is dead, and she has to take legal guardianship of Jeremy I think she'll be forced to grow up and see things in a whole new perspective (ahem the perfect time for Damon/Elena bonding/forming a closer relationship)
She'll have to mature, and I expect to see a darker Elena. With everything that she's been through, I strongly think theirs bound to be some sort of transformation/personality makeover.