It had a fourth film. 2007's TMNT which works as a loose connection to the last film and yet a surprisingly close connection to the 2k3 series.Since the 1982 film TRON got a sequel in 2010, the 1990's TMNT trilogy should have had a 2014 fourth film - set in 1994. Or if it must be set in the current time, then make it about the turtles dealing with old age - and still kicking butt. Either way it would be more original than yet another "restart". That's getting old.
This one is completely disconnected.
Now I'll tell you what they should have done. They shoulda pulled a Jimmy Neutron/Barnyard and released a pilot film theatrically first then continue the series from there. The production values would have been much better with better CGI animation.
Instead, we got a Bay produced thing written by the person who wrote that dumb Snow White movie from 2 years back. At least they're not aliens in this one.