Would you be happy or sad?
I know it's a fool's hope. But there's a part of me that wishes Christian Bale would go, "F my principles!" And go for the total cash grab, joining the Justice League movie. I know it messes up any plans for a Batman reboot, but if WB wants the sky to immediately rain Franklin bills, they'll shut Christian in a room with their lawyers until he succumbs to the pressure.
Would never happen, I know. And I'm aware that there's people on here who would like Chris Nolan's Bat films to go away. But financially it would make sense. Though the move would conceivably put the brakes on the Batman franchise, adding Bale to the JLA would instantly bring an air of legitimacy to the other characters sharing the screen with him - catapulting their respective franchises.
Oh yeah, and assuming Man of Steel doesn't bomb, there is no way in hell that Avengers 2 would win the box office war under this scenario.