Just my theory-
I'm thinking Abraham met Lucille. All through the season, his storyline was a bit more amped up than any other secondary character. The way he laid on the ground at Hilltop after the fight. The way he dumped Rosita. The way he was curious as to why Maggie and Glenn would have a child during the apocalypse. In the comics, Abraham was shot in the eye instead of Denise. I think they saved Abraham to take Glenns place with Lucille on the show, unlike the comics. If you notice during the scene where the Saviors were spray painting the red X on the Librarian laying in the road, Abrahams' face was in the rear view mirror watching the whole time (Why would they film it like that?). Maybe Rosita is pregnant by Abraham and doesn't know yet, and she takes the place of Maggie as the pregnant woman with a dead daddy. And - Since they weren't allowed to speak, I can just see Rosita "blinking" in morse code to Sasha - "He's all yours now bitch" as Abraham was getting his head bashed in.