Once Upon A Time (tev series)

[Mercen-X]

I could swear there was thread for this already, but my search turned out absolute zero.

BELATED WARNING: Spoilers abound. Some are marked, but I don't if other things qualify as spoilers, so read at your own risk.

I'll be running with the assumption that people not only watch but enjoy this show. It's kind of like Heroes but with characters we already know and love. There are plenty of things about the show to love as well as to get a little irked over. Some examples of the latter are dwarves not being actual dwarves, Rumpelstiltskinbeing Hook's crocodile and Belle's beast, Frankensteinneeding a touch of magic to defy death, and apparently now Peter Panis a villain and his Shadow regularly abducts young boys *shudder* etc.

World's delved into include the Enchanted Forest, wherefrom pretty much all Disney/Grimm tales derive, The Land Without Color devoid of magic where Frankenstein originates and they still have yet to explain how he got caught up in the curse (maybe he returned to the Enchanted Forest to find a way to cure his brother of his problem), Wonderland accessed through the Mad Hatter's magical hat, a land that was apparently parallel to the Magic Forest where Sleeping Beauty, Mulan, and the Arthurian knights apparently originate, and finally Neverland, which the heroes will be accessing by Hook's ship come this fall.

According to this picture, there are at least four other worlds OUAT could explore.
The Looking Glass in the middle leads to Wonderland. The door to the left of the mirror is a green curtain with z's in o's: Oz. The two doors to the right are the most confusing, while the door to the far left reminds of me of the doors of a Chinese imperial palace, possibly meaning this is Mulan's land. Whether this means reaching Mulan's land also means accessing the Arthurian world or whether it implies that Mulan managed to travel across worlds is questionable.

Producers say the show has been dropping hints about Oz since the first episode wherein a page from Henri's book shows flying monkeys. Some suggestions made imply Oz pertains to Regina's origins. While we know that Corawas the Queen of Hearts in Wonderland, we don't know when she became such or whether Regina's origins are within Wonderland or Oz. The upcoming spin-off Once Upon A Time in Wonderland may answer those questions.

EDIT: Apparently, there are, at least, six other doors in the Hatter's Hat.

Grey Door (probably the Land Without Color)
Pink Brick Door
Green Door with a Hole/Mirror
Brown Door with Trees (perhaps Nottingham)
Blue Door with four Holes/Knobs (with scales?)
Medieval Brown and Grey Door (maybe Camelot)
Oriental Style Red Door with Golden Knobs (Forbidden Kingdom?)
Green Curtain Door: Land of Oz obviously
Looking Glass: Wonderland
Coffin-like Door (probably Transylvania)
Normal Door with a Keyhole

Someone also mentioned there are least six more doors not pictured. How they obtained that information is not mentioned.

Theories? Opinions? Factoids? Trivia?