IMO, the capital P-Problem with Donna's origin is that there's a constant tug-of-war between the Wonder Woman people and the Teen Titans people over who gets to "define" the character. Once George Perez stopped bridging the two it was only a matter of time before things blew up.

Worse still is the fact that there's no easy answer to the above question. In terms of (code)name and iconography Donna certainly *seems* like a Wonder Woman character first, but the fact is, she's never been as important to Diana's mythos as she was (is?) to the Titans'. Hell, she only *exists* as an independent character because of Titans creator Bob Haney.

(There's also the thornier question of whether Diana even needs a sidekick, which is probably tied into whether one prefers her to be immortal or not. I'll leave that debate to stouter souls...)