Newest leaked picture has been dug out by the Androidandme website and then promptly put on Weibo. It depicts both devices’, Galaxy S9 and S9+, back covers. Phones in the picture seem to line up with what we already know/expect about Samsung’s new Galaxy; of course, these are unofficial pictures, so they may as well be fake.
We will learn whether or not this is how Galaxy S9 / S9+ looks like at February’s Mobile World Congress 2018.