Rosita is in a precarious position. She’s high on Negan’s radar now, after taking a shot at him and damaging Lucille. She is a fantastic fighter but she’s a little reckless. And being reckless or reacting out of emotion in The Walking Dead world is a good way to end up dead.
Rosita is also a little lost. Abe is gone. She is still dealing with the fallout of him breaking up with her and then dying.
She had a bit of a connection with Spencer and he’s gone now too. Eugene has been taken by Negan. Sasha is at Hilltop with Maggie. Everyone that she had a strong connection with in the group is gone.
Her original story arc within the show is pretty much done. It’s possible that she will get a new chapter for her story and go on to become part of Rick’s fighting squad.
But it’s also possible that her time is up. It’s easy to imagine that Rosita won’t be content with taking one shot at Negan and will try again to kill him on her own.
If she does go after him again she will probably not make it out of the encounter. Negan had Arat kill Olivia because of Rosita’s emotionally driven shot at him.
But next time he will probably just kill her, or have one of the Saviors kill her. Negan doesn’t like to kill women but he will kill them if he thinks it’s necessary. Because of that Rosita has a high chance of not surviving the war against Negan.