It depends

I mean they kind of served their purpose. There's no reason to bring them back.

NO.

Done and dusted

@Boo Buster2002 you could probably say that for a number of characters who have ended up being recurring.

I could take or leave the idea. Maybe if they did a story where the Mystery Inc. gang travels in space-meaning beyond the solar system and not just to the moon or something-it would make sense to have Crystal and Amber show up again.

@Kilmarnock228 Even then, the Scooby gang now are not same ones from Alien Invaders. Plus with Velma trying to debunk everything, I just don't think we need to go through the whole "Was it real or not" thing again.

Well, it could be interesting to see Crystal and Amber bring the Scooby Doo Gang to their planet to solve a mystery.