Board Thread:General Discussion/@comment-1255374-20150228233509/@comment-24204226-20150319105611

He could find a way to demutate her. Also, we may see more of the Kraang with Shredder because he supposedly had a deal with them that if he helped them invade they would turn Karai "normal" again.

I think for now, though, since he has Karai that the story will focus more on Shredder. I also think that there will be more focus on Leo, Splinter, and Karai in addition to Shredder. It would be cool if, for the season finale, Leo went up against Shredder again but actually defeated him this time. In "Vision Quest" he did seem to make a prophesy after defeating the spirit Shredder: "I beat you in the spirit world, and one day, I'll beat you for real."