Here's a render of the phone in Samsung's classic Midnight Black color...
...And here's another in the more colorful Coral Blue.
Here's a closer look at those possible camera modules.
The upcoming Galaxy S9 phones imagined in a variety of colors.
The Galaxy S9 is also said to look very similar to the Galaxy S8, perhaps with slightly smaller bezels.
In the video you can see the back and the front of the rumored S9 -- as always, there's nothing official or verified about it.