Board Thread:General Discussion/@comment-6302057-20141203042730/@comment-31427137-20170520153840

In my opinion, however powerful the Dark Curse is, it is not capable of transporting one entire world to another. Therefore, it only takes the kingdom in which it was launched, in this case the Enchanted Forest. All the other kingdoms of this world such as Camelot, Arendelle, and Agrabah, as well as all other magical lands like Oz, Wonderland, Victorian England, and the like were only frozen in time.

Jefferson's motive, Will Scarlet and Victor being in Storybrooke, in my view, was for a few reasons. Will with the help of the White Rabbit went to the Enchanted Forest just before the curse to get rid of the debts with the Blue Caterpillar. Frankenstein and the Mad Hatter were taken from their lands shortly before the launch, by Regina, and brought to the Enchanted Forest. She did this, since both had unique skills and some knowledge, Victor was able to resurrect the dead (other than she wanted him to pay for lying to her) and Jefferson knew about world crosses. She brought them if she needed them later.

Queen Evil's motive to have Hook killed Cora was because she wanted to finally have her happy ending in another land for all eternity. Cora would not have been cursed for being in Wonderland, but her daughter wanted to make sure she did not come after her by any other means.