I really do hope Firing range will be in Black Ops 2, it was by far one of the best maps in Black Ops, but if they put Firing range in a DLC and made it free 'hopefully' or paid it'd be different as Black Ops 2 is set in future. Same with Nuketowen 2025 i've got a feeling that it's going to be different and probably bigger

lets just wait and see. (2 months today in Uk)