Thanks to a forum member who goes by the nick JK Shine (get it?) over at SamMobile, we supposedly have the wallpapers for the Galaxy S7 and Galaxy S7 Edge. There are 13 in total and they certainly look a lot like Galaxy S wallpapers we have seen in the past. They all feature those sort of swooping brush stroke, sea-ish, futuristic jellyfish designs that we have grown accustomed to with Samsung phones. They also tossed in a couple of Material Design friendly options.
And yes, the wallpaper you are seeing in the renders above, that hilariously looks like a “6” even though these phones are of the S7 line, is included.
Assuming you are a fan of Samsung wallpapers (I personally am not), you can grab them all at the source link below or here.