How Many Games Should be Added to the World Series of Poker Dealers' Choice Event?

Poker player Adam Freidman took home his second World Series of Poker bracelet for winning the $10K 6 Handed Dealers' Choice Event. He took home $293,275, which is his biggest cash to date. Sasha Salinger of PokerNews asked him about his game selection and in which games he excels. He explains that sometimes you pick games that you are not strongest in according to your own stack size and your opponents' stack size. The 2018 World Series of Poker Dealers' Choice Event had 20 game to choose from. How many games will the World Series of Poker add next year? Which games will they add?