I think they're going to make Grace queer

That is exactly what I think. As does most of my twitter feed. :D I think it'll be really fascinating if they go that route because we'll also get the political reaction - how Peter deals with it and or how it gets spun - and we'll get Alicia's brother back and possibly deep (or, well, as deep as they get) conversations with Kalinda. I don't know where else they could really be going with it, either, so I am encouraged by how many people are on the same wavelength!