let's see if I can guess

Ok, this is what I think is going to happen with Katie...

I think she and Nick are going to get really close and she's going to have sex with him. Instead of dying, his love (or some other such bullshit) will "heal" her body and she'll end up preggers, making Bridget an idiot once again for chasing after Nick when she knows he's never going to love her the way she loves him.