Reading up on the concept behind the new "Arkham Origins". I think WB should do a similar thing with the first Batman movie of the reboot. Of course this would be a year or two after he's introduced in Justice League.
That suit, that noir feel and look with Gotham. He's supposedly in "year two" as the Batman. Black Mask, Penguin and Deathstroke are the villains and I think Joker may have an appearance.
Unlike the game, I wouldn't make Jim Gordon younger as a captain (as ive read), I would definitely cast Bryan Cranston in the role as the Commissioner. I would also set it right after his first meeting with Joker, so a little cameo or references could be made in the film, unlike the game which I think may be showing their first encounter.
They could drop Deathstroke if they want, I just love the concept of starting off with Penguin and Black Mask. Black Mask has put a bounty on Batman's head and there's a reason behind that, im sure there's that connection to both their childhoods. On film this plays into what I wanted in the reboot which is a Batman 89/Batman Forever approach to having short flashbacks of Bruce's childhood. It could be through Bruce's mind like we saw with Val Kilmer or for something fresh, why not make it through Roman Sionis' POV??
But when I say flashbacks I really mean up to a minute or two at the most. This shouldn't be an origin.
It also is set in the winter, on Christmas Eve. I wouldn't mind a summer film for starters but now that I think about it, the first time we see Batman in JL will probably be a summer setting, with some of the plot in space maybe? So the first Batman solo is really #2. A winter vibe could be cool, if it's really harsh and gothic, but of course not stylized like Batman Returns..hell no. Just how it will be in the Arkham: Origins.
It could lead into a loose adaptation of Arkham Asylum for the sequel. It doesn't have to follow the exact story or have all the same rogues, it could be adjusted to fit whatever the director/writer want in their version. But something close to the essence of it. Riddler/Strange/Joker/Harley...
That's how I would set up the new Batman in the shared universe, if that's the route WB are taking.