During Joker War and Death metal, Issues of Nightwing, batman had to be altered. The story originally had damian as we could see from the drawing but last minute changes were made to have the Robin be Tim.
The drawings were damian but identified as Tim in the dialogue including one issue in the cross over where he was called damian on one page and Tim in the next.
The changes were made after DC decided that Damian should be replaced in the role of Robin by Tim.
The TT's writer Adam Glass revealed Dc's plans [made even before the Glass run on TT began]
It was also confirmed by bendis on twitter