Sources said to be involved in the production of
Star Wars: Episode VII say that, since the fall of the Empire, our heroes have been dealing with an enemy known as "Jedi Hunters". These "Hunters", possibly connected to
Star Wars: Rebels' Inquisitor, are said to "worship the Sith and want to resurrect them.", and could be the roles for cast members Adam Driver, Lupita Nyong’o, and David Oyelowo.
(Source:
MakingStarWars.net)