Looks like it's actually happening (I made this thread about a year ago too).
NFL plans to expand regular season to 17 games per team in 2021
The NFL is planning to expand the regular season to 17 games in 2021 -- a historic move that would generate new revenue and could at least slightly soften an anticipated drop in the salary cap next year, NFL Network's Tom Pelissero and Ian Rapoport report.
www.nfl.com