The next theme that will start after the River Theme will be the "CDG Template Theme".  Where you can take either of the two templates and make a custom player map out of it.  You have the first template and this new CDG: Template2+ to choose from.  Thanks to the 7 members of cdeezgames that participated in making pieces for it.  I assembled it along a river and snowy mountains, thanks to Negrumir, with his cabin with optional snowy roof, lol.  Well it kinda looks like snow.  But you can take them and assemble them any way you like.
The contest will be to use some of the custom pieces and make a "CDG" map out of the template of your choice.
And just make it playable.  I'm sure all of these pieces will bring something different to mind for every different person when making a map.
You can take the templates now, they are already both on the servers, and start your map if you like.  But the contest will not start until sometime next month, I will list a date soon, so don't publish your entry until it has started please.