Supposedly there were hints. Other then the comment about feeding the other eye to his father I didn't catch anything. So Rick and Carl make it probably. .
I thought there were several hints, but feel most are thrown out there to lead us off.
The one hint I think could possibly mean something is the title of the episode. "Last day on Earth ". Negan's right hand man also said this in reference to Rick being nice to the people in the RV because it could be their last day on earth. If this is a meaningful hint, it would mean the (4) captives (Glenn, Darral, Michonne, and Rosita) would be safe.
The show should be concerned about neutering Negan too much from the comic. While a victim such as Darral or Glenn would have a huge impact, I'm not sure if someone like Maggie wouldn't have even more of an impact in the aspect showing the sheer brutality he is capable of.
The ones in the RV were Rick, Carl, Maggie, Abraham, Eugene, Sasha, and Aaron. If I am right about the hint, it has to be one of these 7 and I would guess Maggie.