I've been thinking that as well, and I've been crossing names since last night (I also read that article). So far, I've crossed: all the animals (sorry, but I found hard to bring in a Dumbo arc without heavy CGI pre- and post-prod) and nearly all the princesses (we already saw Mulan, Sleeping Beauty, Cinderella and of course Snow White). What's left? Here's my list, and a few reasons (I'll post ablog later with expanded theories). Also, remember, Rumple did say he enclosed in his chamber the Darkest an/or Understandable magic, which could be a) really powerful magic or b) people from other realm (as he tried to do with Emma):
1. Cruella DeVil. We know Pongo lives with Archie. Where's Perdita? And where's Cruella.
2. Doctor Facilier. Which could introduce a Princess and the Frog story.
3. Princess Merida / the bear carving witch. Merida has no magic of her own, but Rumple may have enclosed, just because it's fun, or because she's from another world. As for the witch, well, she may have tried to transform him into a bear with her food.
We're running out on "Disney iconic characters". Please note I'mleaving off the list characters from less popular movies such as The Black Cauldron or Oliver & Company or any Pixar movie. I'll post morelater in a blog.
Maleficent could have been ashes and held in Rumple's vault until Regina found a loophole, and saved her "Friend" If she had been brought to the future, I think she would have came, looking for Aurora and Phillip.