Watch: Ben Affleck & Anna Kendrick Tease Batman & Robin
How about Anna Kendrick as Robin in the Batman movie?
Worth a mention is that Ben Affleck says the Batman movie isn't a done deal, and that they may not even use a Robin.
Regarding Robin, in Frank Miller's The Dark Knight Returns graphic novel, the Robin was a female named Carrie Kelley.
The Accountant opens October 14th also starring JK Simmons and Jon Bernthal.