Nicotero said in an interview a few weeks ago that there are "deaths". Most evidence (if you follow any of the 'spoiler' groups) is that it's Glenn and Abraham as they've not been involved in any filming. On one hand, I keep thinking it's not Glenn based on it's supposed to be him and the writers like to change things to throw people off. Now though, people could be thinking that and then the writers go back to the written version after all.
I also wondered if it could be Maggie only. Well, her and her unborn child as that would satisfy Nicotero's comment that there's more than one death.
Negan does say the person takes "it like a champ" and not to sound sexist, that doesn't seem like something you'd say to or about a woman. Ooooh, that sounded ever more sexist now, saying a woman can't be a champion.... Oh well, it still sounds like something said to a man to me.