While 1993’s Teenage Mutant Ninja Turtles III didn’t do well enough to warrant a fourth film, the heroes in a half-shell continued unabated in various forms throughout the rest of the 1990s and the 2000s, both in comic books and on screen. The most successful was the animated series, which ran from 1987-1996. That was followed by a live-action series called Ninja Turtles: The Next Mutation in 1997, which only lasted a season; a 2007 animated sequel to the three live-action films called TMNT; and two new animated series, one from 2003-2009 and another from 2012-2017 (another would debut in 2018). Plus the Turtles continued to be published in comics from Mirage, as well as Image and more recently IDW.
And then in 2014, a new film was made.