According to AFS, Tsui Hark (The Raid) will once again direct. There’s currently no information on whether Detective Dee and the Four Kings will be a sequel to the 2010 Andy Lau film (Detective Dee & the Mystery of the Phantom Flame); or if it will be a follow up to 2013’s Young Detective Dee: Rise of the Sea Dragon, which starred Mark Chao. There is a possibility of a time paradox-infused script, featuring both incarnations, according to a 2014 interview with Hark.
Detective Dee and the Four Kings is due to hit Chinese theaters in 2017. Stay tuned for more updates.