Hi there Beverly,
Like you, I am on the edge of my seat just waiting for more Fantasyland details to be announced. As of today, only vague details concerning the November 19th previews have been released. As of now, it seems as if the previews will be limited to Disney World Annual Passholders beginning on the 19th, and according to the pass holder website, the preview will have a very limited attendance.
I know that they did something similar with Cars Land over at Disneyland in California. All Annual Passholders were eligible to "sign up" for a lottery of sorts, with only a handful being selected to actually attend the preview. Specifics have not been released, but the pass holder website states that more information is forthcoming!
Additional preview opportunities *may* present themselves in the future, so I recommend keeping your eyes peeled to the web and social media sites, my favorite source being the official
Disney Parks Blog!
Best Wishes,
Amanda F.