Phew, he's finally gotten a silence. And now we can get on with the intelligent discussion:
iamsilvio, I can understand where you're coming from with Batman and Robin being "in different worlds", but if they're both vigilantes who've been through the same traumatic experiance (the murder of their parents), doesn't that put them in the same world?
In short, for someone like Tim Drake, it could work very well. But if Robin is going to be brought into the current movie series, it would probably have to be Dick Grayson, and that implies that Dick and Bruce are in the same "world". It's really a matter of fidelity to the comics, and I feel you're going a bit overboard in the "adaptation" part.
Of course, I'm something of a layman when it comes to comics, so... yeah.