Here is an image from the Toy Fair of some new TMNT variants from The Loyal Subjects. There are some glow turtles, grey scale turtles and some solid black turtles.
I am really hoping that this is not the only figures we see for wave 2. The first wave of figures were amazing all the way around and it would be a shame to only get turtle variants for the next set instead of some new characters. I would be ecstatic to see the continuation of Mirage comic characters such as Fugitoid, Triceratons, Utroms etc.
UPDATE: I was just informed that these figures are set to be Comic Con and retailer exclusives rather than wave 2. Wave 2 will indeed feature new characters. Stay tuned for more updates!