Lionsgate has released a new trailer for the thriller Antebellum. While the teaser trailer kept the plot vague, this new brief trailer (without spoiling too much), provides the basic premise of the plot. Janelle Monae plays a woman in the present day who has a good and happy life, but then she's kidnapped and forced back into slavery through time travel. From there, she has to fight back to escape not only slavery, but to return to her own time. This is a pretty brilliant conceit since it acknowledges the truth that time travel is really a white man'…