I'll be happy with a repeat of the very silver color scheme. I always have mostly black phones and I'd like to brighten things up. A teal back, white front combo would be fantastic (like one of the fan renders) but I won't get my hopes up.
It would probably be smarter for them to offer the special color options on the higher end model this time though. Not that it would help me personally (I don't use a lot of storage), but it doesn't make sense to restrict the choices of users willing to give Google the most money for the top tier specs. Similar to how Oneplus does it.