At this point their preferred solution to everything seems to be "throw Christopher Nolan at it." Which is still copying a former success -- it's just their own success instead of someone else's.
Well—again, assuming the Nolan connection is an actual story and not just an unfounded rumor—at least building on your own success sounds more promising than ignoring your own success and trying to copy someone else's.
If Man of Steel
really takes off (ha ha), then maybe Nolan really is the right man to produce JL.