this is my suggestion for 3 batman movies set after nolan's movies finish up. The first movie would start out at the circus featuring the Flying Graysons, I'd show the Grayson's dealing with an extortion attempt and being killed for refusing to pay it'd basically go how it did in the comics with Bruce taking Dick in(keep the dumb jokes to yourself) and eventually deciding to train him as Robin. I'm not sure who the villain should be yet, but the main point of the first movie is to set up the relationship between batman and robin. 
    The second movie would be set a few years later with a more grown up Robin and through out the movie it'd show a building tension between the two leading up to the end when the tension comes to a head and Dick quits as robin. 
 
     The third would be the first Nightwing movie.