Liquid are doing it in map 3 so far with Matu playing an old school hero and build on Night Stalker that most likely will win Liquid the series. I also believe that we will see different carry heroes in Secret series as well as the meta kinda shifted in this 1 week pause regarding safe lane and hard support position 
i almost can't believe that in map 3 Team Liquid uses a hero that is very rarely used in matches (Night stalker) which is a little surprising for the team Aster.i think in this semi-final match there will always be a map 3 match.
and from my prediction, team secret will win the team secret vs tundra esports match.
and those who will enter the final round will be team liquid and team secret (just my prediction)