Dan Lin as head of WB Studios could be huge. Lin has said his dream is to make a JL film. He was involved with George Miller's Justice League: Mortal. He's a Batman fan, calls himself a DC "fan boy", has strong ties to Alan Horn and was around at the time of the Nolan Batman films. Hamada is expected to leave when BA comes out which means Lin could be in place in time to make some announcements about DC Studio's plans before the year is out. Zaslav reportedly wants a JL film so who knows, it could become one of WBD's expedited projects.
If Lin gets the nod the first films announced by the new DC Studio head might be a Batfleck solo, Wonder Woman 3 and JL - that film being used to reintroduce a hopefully recast Superman to the DCEU. Beyond that Lin needs to apologize to Ray Fisher for the treatment he received from the old regime - that and bring Fisher back as Cyborg. Fisher's Cyborg was for me the best part of ZSJL.