That happened in the last issue by Phil Jimenez. Diana claims she learned that from her mother...
I actually don't *hate* the idea of a time-travelling Hyppolita becoming the Golden Age Wonder Woman, though. But the Donna Troy thing was just terrible.
One thing that muddled DC's continuity was that, after Crisis on Infinite Earths, some characters were rebooted, but others (read: Titans) weren't. That could've been avoided simply by stating that the "reboots" took place some time in the past. Then you could still have Wonder Woman saving a baby girl from a burning building and taking her to Paradise Island, where she grew up to be Wonder Girl. This shouldve been done with Hawkman, too.