The NFL's 32 owners currently meet in Charlotte, North Carolina, to discuss and vote on various league-related topics. Among those on the agenda were voting for the Super Bowl sites for the 2018, 2019 and 2020 seasons, as well as voting on a change to the instant replay process.
Regarding the Super Bowl sites, the league's owners agreed on the following host cities (via Field Yates):
Super Bowl LIV (2019 season, February 2020): South Florida/Miami
Super Bowl LV (2020 season, February 2021): Los Angeles
All three cities and their teams have recently invested considerable financial resources into newly building or modernizing their stadiums.