Then why is Rumple "based on UP's Carl Fredricksen"? They just took that UP sequence and adapted it to Rumple and Belle's episode, but obviously it's an allusion and it's not like he's Carl Fredicksen. "Based on" is not that definitive.
Espenson said Anastasia was based on the fairy tale character, but obviously she meant the Disney movie imo, as there's no wicked sister named like her in any version of Cinderella's fairy tales.
Yeah, Rumple, Belle, etc. should all be allusion for the Up stuff. Not sure how we are having so much trouble with Red Queen Ana, but that just was added with no problem.