According to Latino-Review on Sept. 4, sources had revealed through talent agencies that Batman will be getting a love interest in "Man of Steel 2". Apparently they are looking for the kind of criteria that entails someone in their late 20s and open to any kind of ethnicity.
Physical characteristics that agents are looking for reveal someone that is highly talented, tall, and contain physicality. By putting together logic, Ben Affleck, who was announced by Warner Brothers to play the next Batman, is quite tall himself. That being said, statuesque actresses like Charlize Theron and Adrianne Palicki do seem to fall under the criteria.
The method of selection by Warner Brothers in the previous Christopher Nolan film was the fact that they had based their selection process on having the actors audition for the part that they know nothing of. They are just looking for the type and style of those that are auditioning and when the selection is made, only then the actors/actresses know what character they'll be playing.
The purpose of this is to keep the online petitions and fan boy speculation to a minimum. It could be possible that Vicky Vale or Julie Madison may be one of the usual suspects. One could wonder that even the amazonian Diana Prince may be a speculative possibility.