At some point, a capricious being elects to grant the (Post-Crisis, Pre-Flashpoint) Bat-crew A:tLA/LoK style bending at a level proportional to their close-combat proficiently level*.
(*: Yes that means Cass is, if not at White-Lotus Grandmaster Tier, not that far below. Whereas Tim, Steph, etc. are... nothing to sneeze at either by any stretch even if they are not matching her.)
How does Wayne's far-less-dysfunctional-than-it-should-be-all-things-considered family adjust if they are all:
- Waterbenders
- Earthbenders
- Firebenders
- Airbenders
Bonus, considering personalities and overall fighting styles... what bending art would fit each?