I can see them essentially wrapping up (or tying off) that plotline in the scene where we're introduced to her in the teamup.
I'm happiest about Black Lightning showing up. It felt like his show ended just as he got there (into the greater universe) so I'm happy that he'll be interacting with other heroes in a (presumably) more light-hearted adventure rather than constantly being tortured like he was on his show.
I'm really hoping this is how we get a passing of the torch between Ray and Ryan - I know a lot of people expected that during Crisis, but now I think we're really, really expecting it...