I would, in no way, have a problem with an Indian actress playing Wonder Woman, so long as she looks like this:
She, by the way, is Priyanka Chopra, a Bollywood actress who may or may not be on Joss Whedon's list.
(Thanks to Heidi for the tip.)
EDIT: Just to be clear, I am not in favor of this Indian actress simply because she's hot. (Which she is.) But the idea of an Indian actress is intriguing. Wonder Woman is supposed to be an exotic creature, from a place far different from our normal, everyday world. And, let's face it, a white brunette no longer qualifies as exotic...even if she is Catherine Zeta-Jones-Douglas. And an accent isn't enough. She needs to look...other-y. And an Indian actress would get you there. Plus, many of them are hot.