As of right now, there is no other superhero quite like X-23 in any notable superhero franchise.
Not since the Harry Potter franchise has a studio been presented with an opportunity to allow an actor (and by extension, a character) to grow up and age in front of audiences in a big budget franchise.
To us, that feels like a fatal error by the folks over at Disney.
Hugh Jackman had 17 years as Wolverine before he walked away, but Ms. Keen could conceivably stick around for decades as the most vicious and deadly female anti-hero that the comic book movie genre has ever seen.