I'd like to hear the evidence that she wasn't dead especially considering how they're going to have to retcon LJ saying he saw them kill her.
To be fair, LJ did tell Lincoln plainly that he only HEARD Gretchen killing Sara, and didn't actually SEE it.
Here's the quote from the scene with Whistler and Mahone in the bar:
"She'd better be able to handle a lot more than that. Because if she has done what you think she has... Sara. She's the weak link. And he will find her. And then Scofield will find you... and me. And I'm not paying for your mess."
It's definetely ambiguous in that he could be referring to either Sara or Gretchen. That short pause makes it uncertain, but I'm choosing to believe that he is talking about Sara and how she escaped on her own and is currently on the run.
Anyway, since we're on the subject of resurrections here, I can't wait until Kellerman returns. You know it's only a matter of time.