GCT Studios has the first preview for Wave 18 up on their website. Go have yourself a look.
From the post:
Wave 17 is off and should have been landing on all your dorsteps in the last few days and so as surely as the water wheels of Ryu keep turning lets get on with Wave 18. An interesting wave with lots of carrying going on, a long necked snakeman and two very different samurai as well as a pack hound of the Wave.