I honestly think that it's too difficult to predict what zoos might possibly lose AZA accreditation. It's actually quite nice to see the organization clamp down on offenders, and zoos such as Montgomery and Pittsburgh have willingly given up their accreditation in the past due to a variety of reasons (mainly elephant-related). Honolulu has lost its accreditation on several occasions, Niabi was removed a while ago, and now Chahinkapa, Columbus, Erie and Safari West all getting booted out within a short time period has been shocking.
Sometimes zoos lose accreditation for purely financial reasons, such as Zoo Montana. That small facility is one that I've visited twice, with all the outdoor exhibits of a reasonable quality. However, the zoo had funding issues and financial problems that a regular visitor would never have been aware of. Thankfully, Zoo Montana regained its AZA accreditation and is good until September 2025.
I think that smaller zoos with limited resources can sometimes struggle to pass the AZA accreditation process, so a place like Bramble Park Zoo in South Dakota would be an example of a zoo that relies on community goodwill and local donations. Charles Paddock Zoo has made a lot of improvements since I visited a decade ago, but the AZA somehow allows the facility to keep a tiger in an enclosure that is clearly inadequate. I was not at all impressed with Ellen Trout Zoo in Texas, but somehow that place is still accredited until March 2023. Jenkinson's Aquarium in New Jersey keeps seals in a tiny, all-indoor pool that's not very pleasant, but the facility is accredited until March 2024. All those places could be contenders to lose accreditation if the AZA continues to be vigilant with zoos.
Here is the list (from the AZA website) in regards to evaluations in 2022:
Accreditation Applicants
Africam Safari Park
Aquarium of the Pacific
Boonshoft Museum of Discovery
Busch Gardens Tampa Bay
Cabrillo Marine Aquarium
California Science Center
Cameron Park Zoo
Central Florida Zoo
CuriOdyssey
Fresno Chaffee Zoo
Gulf World
Happy Hollow Zoo
Lion Country Safari
Marineland
Museum of Life and Science
Naples Zoo
New England Aquarium
Oregon Coast Aquarium
Parque Zoológico de León
Ripley's Aquarium in Myrtle Beach
San Francisco Zoo
SEA LIFE Arizona Aquarium
Texas State Aquarium
Wonders of Wildlife
Zoológico de Cali
Certification Applicants
Lemur Conservation Foundation
Turtle Conservancy