Nope. She is better off died. If she is back. She needs sufficient to the plot. At the moment, she does not, yet she does. She would "break" Obito control of the Juubi and the Juubi would be left to run wild killing everyone which we know Kishi would not allow. .... Nobody is dying. >_>
That would be horrible
1. It would be out of character for Rin
2. It would render Obito's motivation entirely pointless
3. It wasn't foreshadowed at all.