Well, still no new TMNT sets, but this weekend I created Slash. I've seen various people calling for Mega Construx to make him. Maybe someday they will, but until then, take a look at my version of Slash. And then you could try and make your own, if you so desire. My paintwork still needs a bit more work, but I think it turned out alright.
https://www.megaconstrux.com/en-us/comm ... ry/slash_1