Why focus on a white android? I'd be interested in one that was not, white. Or it could be interesting if perhaps all the androids that Weyland-Yutani creates, are white. Maybe built because of some sort of racial bias. Even then, Weyland-Yutani is a British-Japanese company, so I would assume there would be Japanese tailored androids of some sort. We've only seen, white, stereotypically "other" androids. I just think, if this is post 2179 to the point Ripley has aged as much from Aliens (1986) to here (2015), would be 29 years, or 2208. By that point, in that world, I would assume there wouldn't be, just Caucasian modeled androids. So, it'd be interesting to change that.
Ken Watanabe would be an interesting casting choice.