Though official info from WB stated Tap Okamoto is playing a new character for Batman Vs. Superman, Okamoto is also rumored to be playing Mercy Graves, who in the comics is the Amazonian bodyguard to Lex Luthor.
On her Instagram, Tao Okamoto stated, "Day 1 of working out with a personal trainer! My new year's resolution: good bye to the skinny body!"
It's possible Tao Okamoto could be in training for either the Justice League movie or even Wonder Woman (or both), especially if she is playing the Amazonian Mercy Graves (Batman Vs. Superman is finished filming).
"Batman v Superman: Dawn of Justice" has a March 25, 2016 release starring Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Amy Adams as Lois Lane, Laurence Fishburne as Perry White, Diane Lane as Martha Kent, Jeremy Irons as Alfred, Jesse Eisenberg as Lex Luthor, Ray Fisher as Cyborg with Callan Mulvey, Holly Hunter and Tao Okamoto in new character roles for the film. Justice League is to follow directed by Zack Snyder as well.
For more news on the "Man of Steel" and related movies head on over to the Cosmic Book News Superman movie hub.