CP3S, you're a little harsh man, DomCobb was just trying to make a point
Anyhow, from what I can tell it was just a set up for a new Batman. They called him Robin so the average joe would connect him to Batman, they gave him a new signal, showed him the Batcave, yeah it's confusing, but I do think Nolan was aiming for the mass market, and not just the die hard Bat fans.
The Dark Kinght made shit loads of money because everyone, not just the fans, went to watch it. It makes sense they cater for a wider audience and not just the die hard fans.
Shit, everyone knows Batman & Robin from their childhood, being the 60's show or comics or the cartoon series.