In a new interview Scott Snyder mentions once again a new Infinite Frontier series by Williamson, following the repercussions of Metal and the creation of the Totality.
Seems like after the already announced #0, the book will continue as an ongoing.
Presumably the series will star Martian Manhunter, Hawkgirl, Mr Terrific, Lex Luthor, Talia Al Ghul and Vandal Savage.
Link to the interview: https://www.gamesradar.com/scott-sny...21-and-beyond/