Still 5 episodes to go according to IMDB but I'm calling the next death as Abraham's.
They showed him finding peace last night when he was being choked which is because he saw his wife. Remember in the RV the fella talking about how when he thought Abraham was going too kill him he saw his wife and broke down? That's what happened, Abraham thought he would die and saw his wife who apologized and told him to come home. The necklace being left on the ground is symbolic that neither Rosita or Sasha is right for him and he has to be with his wife.
I speculate next couple of episodes they head towards Negan's camp and either get intercepted or captured... At some point Abraham will sacrifice himself so they can escape. This'll lead to the finale (no doubt a 2 parter) where Negan gets to Alexandria and Maggie at least gets killed off, possibly Glenn as well (though the more I think about it, the more I expect they will keep him alive and play off that next season)
My reasoning is that Maggie went from a zero to hero- she had next to no screen time and all of a sudden Rick is grooming her for leadership. Then they are talking pregnancy in the RV, she's happy Glenn is alive, the doctor wants to help them, all is well etc... everyone should know by now this is Walking Dead foreshadowing and she's as good as dead.
Edited to add: I did not read the comics... so no spoiler tags as this is speculation on my part.