TMNT: Next Mutation, in my opinion, was a disappointment. After I watched an episode or two and saw how different it was from the animated series and even the movies and comics, I stopped watching it... I didn't like how they didn't include many of the same characters from the other forms of TMNT and how they created characters of their own instead. Also, in my opinion, TMNT works much better as an animated series rather than a live action series.
BTW, thanks for the idea about the Shredder icons. I'll see if I can make a few and put them up eventually.