[QUOTE=Tzigone;4786669]Short of Diana herself doing it, which creates some weird continuity problems itself, there really isn't a feasible way of Donna getting to the island without some sort of divine intervention. Access to the island is forbidden except for when the goddesses allow it. Plus I'd like to have some time where Diana and Donna were both kids being raised by Hippolyta together, though Diana would of course be in the 11-13 range while Donna is an infant.That gives it a whiff of "destiny" or "chosenness" to me, which I don't like for any characters (I do hate prophecy) since nobody else is getting dropped of on the island....actually, I guess some have (at least temporarily).
If Rhea rescues her, there is some unavoidable "destiny" stuff, but that was sort of in place anyway. As convoluted as some of that Titan Seed stuff was, it does come with new locations and a corner of Greek myth Donna can call her own that her big sister doesn't really have a claim on.
I'd have her be living on the island until she leaves to become Wonder Girl and pretty much live with Diana from that point on. I would like her to travel back and forth, but I also like Rucka's Rebirth Year One (and how it played into the origins of Cheetah, Cale, Deimos and Phobos, and Cyber) so I'd prefer that be kept. So when she leaves, she's pretty much stuck in Man's World until both she and Diana can regain access due to Ares escaping or whatever.
I'd think she'd have to leave early at a younger age than Diana to acclimate to our culture more quickly than Diana does. Especially as she's more of an "everywoman" than Diana who has a double identity and is starting her own business with Aurora Studios. I'd even have her lose her accent a little more than Diana when she learns English to distinguish them. So the younger the better, like around the same age as Dick after he's been Robin a couple years.