Bruce needed a sidekick to help him stop Joker, but surely Tim wasn't ready for the role of Robin. 
[img]https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQI7ePwSFtgn5X2Fewb7XvGSDVarQ3Z12G01l5b34WG2ys3wjyr[/img]
He could of made Tim a new Robin, Bruce looking into the eyes of Tim Drake.