Well, Lego has officially announced to stop the Mixels series earlier this year. And obviously there will not be any newer Mixels available after series 9.
Swestar, another great creator has shared many of his MOCs in his flickr. In my opinion, most of his creations look like robotic Mixels.
Also, Swestar‘s colors selection for all of his MOCs is definitely awesome and unique! And Korpen is my favorite from the list!