I don't think so that there is any new music coming, up until june because if thats the case they would have already announced it.
The video of the "melting butter" came up on April 26 with the Butter single drop on May 21st which was 2 days before 2021 BBMA.
They can still announce it after PTD Las Vegas. 2022 BBMA is on May 15th. It still makes sense! 
