Wow. It's not like TMNT has had a faithful origin (I know at least 5 Turtle origin stories). Really, all the fans would ask is that they be Teenagers, they should be Mutant, they should be Ninjas, They should be Turtles.
That's the TITLE. When Bay made Transformers, for better or worse, at least they Transformed. All that's left of Teenage Mutant Ninja Turtles is Teenage, and Ninja. And that's assuming that Bay's turtles practice Earthly Martial Arts. At which point we're left with Teenage. Probably. Assuming Bay resists doing the, "We're aliens so we're a billion years old!" thing.
I'll give Bay a chance. I'm fair that way. I'm just saying it's a bad sign when you have AT BEST 50% of the title right.