[quote=Charlie]
If I'm right they call the alternate realities Earth-1, Earth-2, so on...And keeping to source is simple enough...I guess I'll play as Robin sense he does turn into Nightwing, no real loss with with that switch.I'll just make a new one and we'll have Nightwing onfile. If thats ok with you?.
[/quote]

Yes, completely okay

And yah, but they are not aware(most of the time) that there is other earths(Not all the time though)