No confirmed dates, but 2022 is the safe bet for both. Technically, the 50th anniversary window is October 1st, 2021 to April 1, 2023. For perspective, Remy's ride has its own webpage on the Disney World website that announces its opening date of October 1st, 2021. The Star Wars Starcruiser hotel also has a webpage with a 2022 announcement. Anything's possible, but since Guardians and Tron don't have their attraction webpages yet, does that mean it will be even later than the Star Wars resort? Not sure. Even if they blaze through construction, they still have to train cast members.
Walt Disney World: Two Projects Removed from 2021 Release Schedule (from January 2021)