The President of CONCACAF, Victor Montagliani, reportedly told the Jamaican press that the Gold Cup will expand to 16 teams for the 2019 tournament. Nathan Carr tweeted out the quote on Monday.
Victor Montagliani tells Jamaican press: "2017 is the last edition of 12 teams in the Gold Cup as we will increase it to 16 for 2019."
— Nathan Carr (@caribbeanftbl) January 10, 2017
Such a change to the format is intended to raise the profile of the tournament but will have little impact on the USMNT or the outcome itself.