Board Thread:Spoilers!/@comment-1894786-20151104191856/@comment-1894786-20160301005851

Everyone, please take this with a grain of salt, as it's not been confirmed for 5B, but Eddie Kitsis did confirm that there will be a Once: Wonderland episode on main Once "one day", in order to wrap up those characters. You can read the interview here.

Now, these are just my theories, but: it'll most likely be a Scarlet Queen-centered episode (Will and Ana) since they're the only characters that need resolution after that god-awful Will subplot in season 4, but we might see Cylice (Cyrus and Alice) pre-baby, and it surely wouldn't be a reunion episode without Percy Rabbit and Jabberwocky and it could very well set up Jafar being brought into the main story of the show, also possibly setting up Aladdin and Jasmine.