I know New Frontier has the Elseworlds imprint, but I can't think of it that way. To me, it's an adaptation of the DCU, as much its own thing as B:tAS. Even if it is also a comic. ^_^
Really, there are two Elseworlds with good Wondy showings. One is Justice Riders, where she's, yeah, sort of the main character, and very in-character. Unfortunately, she's also inexplicably stripped of her powers, up to and including the lasso, while Hawkman can still fly, Flash can still steal the bullets of a dozen men without appearing to move, and Booster and Beetle still have awesome machines at their disposal. The other is Elseworld's Finest, in which she is a tertiary supporting cast member.
So... hard to be too enthusiastic. Especially given how many Elseworlds Diana's been in.
Amazonia is... I don't know. My overwhelming response to that story is "it could have been worse." Oh, and "why is it always bloody Jack the Ripper," but that's a different issue, heh.