All of the rule changes have been announced for 2020.
https://www.mlb.com/news/mlb-rule-changes-for-2020-season
I hadn't heard about the changes to the IL and minor league options. It's back up to a 15 day minimum stint on the injured list and you can't recall a pitcher less than 15 days after sending them down. No team will be able to pull the Dodgers scheme of rotating their rotation with minor league options and 10 day IL stints anymore.
https://www.mlb.com/news/mlb-rule-changes-for-2020-season
I hadn't heard about the changes to the IL and minor league options. It's back up to a 15 day minimum stint on the injured list and you can't recall a pitcher less than 15 days after sending them down. No team will be able to pull the Dodgers scheme of rotating their rotation with minor league options and 10 day IL stints anymore.