I recently re-read Peter Tomasi's "Batman & Robin: The Big Burn" (Batman and Robin (vol. 2) #24-28, Batman and Robin Annual #2) and there were some changes made to Two-Face during it:

1. Rather than having acid thrown in his face during a trial he was now disfigured in his office by the McKillen sisters after they murder Gilda
2. Two-Face is aware Batman is Bruce Wayne
3. The story ends with Two-Face committing suicide

Was any of this ever addressed in subsequent issues? Obviously the suicide was retconned because Two-Face has since turned up alive and well and he doesn't (AFAIK) know Batman's secret ID. Was this intended to be Two-Face's final appearance? Or was it canon until Rebirth?