I'm just gonna doubt that this 'new Powerpuff Girl' is a permanent thing, much like this was
scenario A: they're unironically pulling a Poochie/Baby Poof/Sparky/Chloë/whoever the new fairly oddparents character will be in the next season, and are making this new powerpuff girl a main character
scenario B: it's gonna be a one time thing but they're hyping it up as if it's scenario A anyway
either way these guys suck ass