An interesting list has appeared online showing the upcoming movie trailer releases for December 2016. Fansided has the list posted here
, and on it a December 20th 2016 date for teaser trailer #1 for Star Wars
: Episode VIII. Now why would they release it only 4 days after Rogue One
? Perhaps it will be revealed earlier in the month online and this is the date theaters are allowed to start showing it? Time will tell!