TMNT actress Megan Fox since the end of production days of TMNT 2 recently has confirmed she is pregnant with a third child. Because of this, Megan Fox might have to take care of both her children then eventually baby #3. She might then for this reason end up cut from Teenage Mutant Ninja Turtles 3 which is in early development.
However, Chloe Moretz (The Little Mermaid/The 5th Wave) has confirmed that she will be succeeding Megan as her character April O'Neil aiding the turtles, KC Jones, and fugitive robot known as The Fugitoid (voiced and portrayed by Patrick Stewart) (X-Men), with Splinter, in battling the revengeful Triceraton Empire threatening mankind in TMNT 3.
As Megan Fox for now remains out of film work, Chloe Moretz might debut as April O'Neil in TMNT 3, in theaters 2018.