From my first impression the map's main feature is its verticality and open space
Duelist: Jett
- The map is vertical which is Jett's whole thing
- Jett dashes and updraft allow her to traverse across all the death falls
- HM: Neon (Some super close corners that seem easy to stun + neon gets new buffs now)
Initiator: Sova
- Drone benefits from verticality and doesn't risk falling off the map
- HM: Breach/KAYO (Also doesn't have utility that can fall off the map)
Sentinel: Cypher
- None of the other sentinel players can do much when the enemy is jumping over your setup
- HM: Sage (Grimm walls will probably happen here)
Controller: Viper
- I would imagine the walls help isolate the upper/lower angles
- HM: Harbor for the same reason or Omen because he's the most versatile controller
Meta comp will be those four + one of the HM agents
EDIT: HM will probably be Breach I just realized he can ult people off the map