Paramount's project has come under fire from the hardcore Turtles fanbase after the studio opted to change the title to Ninja Turtles and make the half-shelled heroes part of an alien race.
Liebesman told Digital Spy that he is working closely with Teenage Mutant Ninja Turtles co-creator Kevin Eastman to tie the movie back to the original comic stories.
"I thought it was so great that so many people care and are passionate about it. It's so great to know that there's an audience out there interested in the movie that you're working on," Liebesman said.
"We're working with Kevin Eastman, the co-creator of the Turtles, so what we do is going to tie back into the mythology. I think fans will love what we're coming up with.
"I'm a fan from long ago and I think it's so exciting, the stuff that comes out of Kevin's head. I think fans are going to be extremely happy when they see what we're doing."
Ninja Turtles will arrive in US theatres on December 25, 2013.
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Photo gallery - Teenage Mutant Ninja Turtles in pictures: