I haven't yet head anything about LBT 12 but the title "The day of the Flyers" and that it is schedulled for 2007. The last few LBT movies were all realeased in January (in the United States at least), strangely shifted there from the pre christmas time. If the same will be true for LBT 12 it is very likely that there will be such a trailer. They are also likely to put up trailers at www.landbeforetime.com (usually three or four months before the release of a movie).
