continues:

I know Zack Snyder has expressed interest in filming an adaptation of The Dark Knight Returns, and even got Frank Miller’s blessing at Comic Con last year. If Nolan isn’t interested in making a fourth Batman film, I would love to see Warner Bros take the leap and do the alternative future story with Snyder in the director’s seat. That way you could give the A-team (cast and crew) behind the Batman Begins, The Dark Knight and Batman 3 a break and still make another Batman flick. Sounds like a much better idea than possibility tanting the franchise with a Justice League movie featuring a recast younger Bruce Wayne.