According to a report by Devin Faraci of Badass Digest, Bruce Wayne has been around three decades by the time Batman V Superman begins, meaning Bruce Wayne is in his 50's. This explains why recent set pictures show Ben Affleck rocking some gray hair. The update is that Batman will be in his 40's and not his 50's. However we'll just have to wait and see.
Apparently the Batman has maintained a low profile during those three decades. Faraci describes him as “a quieter operator, not involved in blockbuster battles but in all sorts of badass vigilantism.” SOURCE: Unleash The Fanboy
In this version Batman is still an urban legend, a creature of the night, and no one has ever taken his picture. But he’s had plenty of adventures, and the Batcave includes a memorial centered around a tattered Robin costume. This is one of two things. Either Dick Grayson didn’t bother to get his old Robin uniform repaired after becoming Nightwing, or (and this would be so much better) Batman has a memorial for Jason Todd! With three decades on the job, it’s not hard to imagine Bruce going through several Robins, and after losing one of them to his arch-nemesis, he started working alone again. If DC is indeed planning a Batman solo film, Jason Todd’s return as Red Hood would make an excellent story. SOURCE: Badass Digest