I also hope they have more interior coloring besides the standard issue black, grey, or tan (neutral) that GM is so fond of using. Nothing bright and loud, just a variety to choose from.
To me, GM's exterior colors such as any shade of grey or silver just seem dull. Like the colors the military paints their battleships. It was so nice even up to the 1980's when there 15 - 20 different colors to choose. There'd be 3 or 4 different shades of blue or green. And none at any extra cost!