Speed growing of cloning another common thing in the Superhero Genre. In Young Justice, Superboy is only 16 weeks old but do to accelerated growth and telepathically evading him everything he is 16 years old physical and slightly older mentally.
Not just Young Justice, Kon was speedgrown in the 90s too! “The Kid”… ahhh, why’d you have to remind me about Kon, now I’m just bitter at DC all over again!
I agree! Sting could definitely be speedgrown. Though that begs the question of “was he let out as a kid in the present”, or “did he only get let out in the future as a teenager”?
Maybe Yukino and Rogue met up with a fully grown Sting (or… teenage Sting) sometime in the nebulous dark future and teamed up with him then?