As American retrofits its Boeing 777-200 fleet, their only aircraft that will retain a first class cabin is their Boeing 777-300ERs.
The 777-200s get a good business class seat (similar to American’s 787 business seat), but once reconfigured no longer have a first class cabin.
Effective December 17 American is putting reconfigured 777-200s in for 2 of their 3 New York – London flights, apparently to free up aircraft for Sydney service.