Yeah, I don’t think Regina will turn back to self-serving evil, but she could be just as much of a threat “for the greater good”. I think her thoughts would go something like this: Results are what matter, and “The Evil Queen” was a convenient label for maintaining order. Henry almost died again, so keeping control of the Dark One’s power would be effective protection. Rumpel needs a restraining hand, anyway, for his own good. Law enforcement in town needs strong leadership to counter all these threats that keep appearing.
Huh; I didn’t mean for that to turn into a metaphor.