I think this map is gonna be the Controllers/Sentinels playground (Map is really short and has a ton of ways to lurk) + probably the double Controller comp are going to be the main meta of this map:
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Controllers: Harbor and Viper can dominate 2/3 of the map alone easily (a combo with these 2 TOGETHER is really strong); There's a lot of 1-way spots to do with Omen or Brimstone on Bomb A; Astra doesn't have that much impact, so, no meta.
Duelist: Raze can clear almost all corners really well; Phoenix can work more as an Initiator than a Duelist, since he has many utils that help the team to explode the bomb and clear some corners too, so is Neon; Yoru is Yoru... If you're a main, you'll find out a way to make him work in the map, but I really don't think he'll become meta; Reyna is shit π©; Jett is dead π.
Initiator: Fade is a must have imo (Since the map has a lot of walls but not many roofs, Fade spots are really strong comparing to Sova's recon dart); Breach/Kayo/Skye are good option to enter the bombs clearing corners with Raze and flashing everyone; I think Gekko could work only in a 3 initiator comp
Sentinel: Killjoy is a must have in all maps, since she never gets a nerf/other sentinels never get strong buffs; Cypher is the only great option if anyone of your team plays with Killjoy cuz he has a lot of nasty wire/cam spots; Sage and Deadlock is mid (Deadlock need buffs); Chamber is kinda dead as well π
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TL;DR: I think this map is gonna be the Controllers/Sentinels playground (Map is really short and has a ton of ways to lurk) + probably the double Controller comp are going to be the main meta of this map
The better comp is:
Raze
Fade
Harbor
Viper
KJ or Cypher