I'm a bit behind with this (Episode 12, Season 1) as I didn't think I'd enjoy it (more police crime drama, less superheroes and supervillains) though as with Breaking Bad, I'm hooked.
I can't imagine there's any cancellation on the horizon yet, but I'd be willing to bet that in the final episode we'll see Bruce suit up as Batman (though probably a different actor due to the youth of the current one).