In 2022, the MLB will be celebrating its 100th anniversary. The league has been discussing whether or not to start a minor league baseball system. This would allow players who are not quite ready for the majors to play in a league that is more like them, and it would also allow players who are not drafted to have an opportunity to make it into the majors.
The MLB has announced that they will be discussing this at their next meeting, which is on December 12, 2018. Also you can read this article: https://www.golf.dk/sponsoreret/vil-der-vaere-en-minor-league-baseball-i-2022