Should Robin be introduced in the 2nd or 3rd movie?

Rating: 10/10 (14 July 2005)

I say no for the 2nd, and no for the 3rd , i have nothing against robin but i think it would take away from the Batman and would probably mess up the story cuz it would have to tell about how robin became robin and half the movie would be his back story.
But he was a big part in some of the comics i was just wondering what everyone else thought about that.
Also what other adversaries should be in the upcoming movies besides the Joker. I don't really think they should bring in the riddler or freeze yet maybe some other villains that we haven't seen on the big screen yet like Killer Croc or Mad Hatter or maybe even Clayface? just wondering your opinions