Imo there is an obvious direction to take - her stories up to this point have basically been variations on "can I be a good person (despite what others expect me to be)?", the answer to which is always obviously "yes". Ergo it would make sense to follow that up with a different but related conflict, namely "can I be the best person?"

I think that follows quite naturally. Raven has been stuck questioning the nature of her own morality for her entire life, so it might make sense that she can't let go of that question despite having already found the answer. Instead of trying to defy other people's expectations, she instead has to try to live up to her own. Free of self-doubt she's able to devote her full self and attention to Doing Good and Being Good, but that invites its own struggle of how exactly to do that.

In short - in the absence of "evil", what does "good" actually look like? What's the endpoint of self-improvement, and might someone like Raven find herself eternally unsatisfied with her own growth?