Taking different elements from different versions of the character is definitley the the ideal situation (I think we can all agree on this). But the problem is if they didn't want a more Post-Crisis Superman movie in the 90's (which would have been the perfect time) what makes people think there going to want it almost 20 years later in 2015? I mean it's not like WB doesn't know what Post-Crisis is. They've made Lois and Clark, STAS, and even elements of Smallville which is still on the air. And the most important thing is not only have there been countless pitches from movie and DC writers before and after SR, but Paul Levitz who ran DC for the last decade also worked very closely with the film division. For those who don't know Paul he is one of DC's most respected writers of all time. Since Mr. Levitz knows more about Superman than 99% of the population, don't you think in one of those board meetings about the next Superman movie he would have showed them Birthright and MOS? And then when those two were rejected he would have pitched the exact same thing you said. Take from those two and also the Pre-Crisis stories and we can make a great movie that the fans and the GP would love. If there is one guy I would want in a meeting with movie execs about Superman it's Paul Levitz. Warner Brothers has heard a lot of pitches and unfortunately they always tend to choose the more drastic ones.