While there are currently no directors attached to the project, Marvel may be closing a deal with a writer. According to The Wrap, writer Joe Robert Cole is nearing a deal to write the upcoming Black Panther film. At this point, Marvel had no comment on the information.
Joe Robert Cole is known for the 2011 film Amber Lake, as well as being attached to the 2019 Inhumans film from Marvel as well. If this turns out to be fact, it would make sense, since Cole is already attached to another film.
Black Panther is set to come out on July 6, 2018.