I sometimes feel that instead of embracing the character, Nolan tried so hard to side step his true comic book personality at every step that he ended up losing the very soul of the character. Batman himself never interested Nolan who just happened to be making Batman films. The supporting characters were always much more interesting and given better material to work with. Batman was like a supporting character in his own films, a hollow center.
I hope we don't see a repeat of any of this. We want a good Batman and good Batman films.
I feel like Nolan was a brilliant independent mind who never felt comfortable with the superhero genre. Thus his initial attitude seems more like "what can I do to make an interesting movie character?" rather than "how can I bring this character to life?"
I felt like that mindset carried over to Goyer when writing MOS, though ironically, I feel like Snyder went out of his way to make a SUPERMAN movie. From the effects of bullets on his body, to his reaction to having superpowers, to the up, up, and away visual reference as well as the AllStar shot of Superman when in space, the film seemed to visually try to reference the source material quite a bit.
However, I feel like it's important to move away from the Singer (Let's bring prestige to the genre) mentality, and more towards the Whedon mentality (Let's embrace the material and genre). I feel like Nolan leans toward the former.
That's why I am surprisingly okay with Nolan not being a part of W/F, though I'm more concerned with the writing and storytelling of the movie.
I know that it will probably be more comic-bookish and a bit more silly than a Nolanesque film, but Snyder doesn't have to create a masterpiece. He just has to know what makes both character's TICK, and go from there. All it needs is good character interaction between both characters and decent pacing, and it will be a good movie. Having a great plot and developing the MOS saga can push it into greatness, assuming the dialog is at least good.