This is far from the worst news about this movie. One of the recent script iterations of this movie got leaked. The Ninja Turtles aren't mutant. They're aliens (that think they're mutants). They are being held captive by the military and are freed by two random teens who wind up helping them find their home planet. A planet of ninja turtles. Aliens that look like humanoid turtles. That know the Japanese art of ninjitsu. That are named (even on their home planet) after Renaissance artists from Italy. That are the four chosen ones to save their planet from the Krang aliens. Also, it's a Michael Bay movie.
So the Megan Fox news doesn't sound so bad now, does it?