With the casting of Minae Noji in an undisclosed role for Teenage Mutant Ninja Turtles, online speculation immediately led to the actress playing the daughter of Shredder, Karai.
I don't believe the role has been confirmed as when Minae Noji's involvement was first announced in Teenage Mutant Ninja Turtles it was described as a secret role.
Now we have some evidence that suggests at least Shredder's daughter is in the movie.
Idle Hands got a peak at the Teenage Mutant Ninja Turtles Movie LEGO collection where Karai is listed.
They note they don't think the LEGO sets are for the TV series as Raphael matched the recent movie images that leaked online.
While no photography of the TMNT LEGO sets was allowed, they did provide the following description:
There was a sort of pick-up truck in the set next to a building. Driving the truck was a Foot Soldier and in the back, manning a gun, was Karai, Shredder's daughter.
The Teenage Mutant Ninja Turtles movie LEGO sets are as follows:
79115 Turtle Van Takedown
79116 Big Rig Snow Getaway
79117 Turtle Lair Invasion
"Teenage Mutant Ninja Turtles" has an August 8, 2014 release produced by Michael Bay starring Megan Fox as April O'Neil, William Fichtner as Shredder, Pete Ploszek as Leonardo, Alan Ritchson as Raphael, Jeremy Howard as Donatello, Noel Fisher as Michelangelo, Will Arnett as Venon Fenwick, and Whoopi Goldberg as Bernadette Thompson.