It's been rumoured since the original Cosmic Movie News "reports" that Batman would first be introduced in "Justice League" and then spin off into his own solo films after that. Batman's 80's anniversary is in 2016 I believe, I would be surprised if we had no Batman film in that year, that would be of course a year after "Justice League" comes out. That would mean we would probably start to get actual real news sometime late this year or more likely next year with regards to casting.
I wish DC Ent would reveal their plans like Marvel Studios has candidly done...then at least we'd be able to distinguish fact from fiction a little more easily instead of getting these constant speculation pieces. I'm still a little surprised that we've not gotten actual official news on either project yet since the announcement of Will Beals writing the script.