Board Thread:General Discussion/@comment-25614818-20150410170303/@comment-26328365-20150419223513

Okay sorry to burst your bubble but the creators named her off as Mikeys love interest. So i'm afraid your proverbial elephant in the room is very pink. Can't really say no to the creators saying it. :/

That’s right, a fan favorite of the Mirage comics who appeared last in the 2003 series will be making a return to television. It was hinted that she would be making an appearance during Season 3, but all that they could really say was that it will be “soon.”  Renet  is a Timestress and an ally of the Teenage Mutant Ninja Turtles, and she will apparently be a love interest for Michelangelo. This series just keeps getting more and more awesome, and the inclusion of Renet and her story is definitely nice to hear about. 

Source 

http://www.teenagemutantninjaturtles.com/blog/top-5-moments-nycc-2014-tmnt-panel/ 