I have a REALLY bad feeling about this. This is NOT going to end well. Somehow Zira is going to fall back under Scar's umbrella of manipulation and even more chaos and heartache will ensue. I worry for Zira, her unborn cub, most likely Nuka, and Mheetu.
I think this is where Zira really differs from her mom. Rather than face a potentially dangerous situation to defend those she loves, she just sits and waits... waiting for history to repeat itself.
So it makes sense that Scar placing himself as the center of Zira's world would have a terrible effect on her when Scar himself is removed violently from it. The only thing she could do was blame Simba, and in turn become just as toxic of a parent as Scar was.
Or at least that's what I'm guessing happens to her. Though despite how shitty her life ended up being, that definitely won't excuse her from what she does to her own cubs just the same way Scar's experiences as a cub doesn't justify his actions as king. Like killing an entire innocent pride out of childish spite.
I don't know if this is what raven is planning on doing, but it seems like it. We'll just have to wait and see.