Hi - Delta has placed a big order with Airbus. 
The airline, as you most probably know, seems to support accessible aircraft as one of its subsidiaries is heavily involved in the development of an onboard wheelchair seating system which would allow the mobility disabled to  stay in their wheelchairs for the flight if they so wish. This seating system has been designed so that it would not affect airline revenue.

If possible please encourage Delta to work closely with Airbus to make these new aircraft accessible. On this LinkedIn posting you can comment “ Delta make these new aircraft accessible” - https://lnkd.in/dKM7w6TY .

Thanks

Pekka