We know that a master VotD is coming later this season with slight changes to encounters.

we already know that the raid has champion's but master will most like add or switch preexisting enemies to champion's with Glyphkeepers probably becoming champion's in all encounters and as well as a focuses on increasing sola and melee damage.

we can also view the raid challenges names in the triumph now but I can only see three but there are 4 main encounters

Swift Destruction

Base Information

Looping Catalyst

we can only make assumption about what they could from the names alone

with swift destruction having to do with the obelisks in the first encounter and base information probably is about the memories in the caretaker fight but I have no idea on what looping catalyst could be .