Should Batman's cape be CGI? Snyder proved with 300 and MOS you can do far more visually with a cape if it's cgi. And since the cape would likely be black, or a very dark blue (if they choose to revere the comics to that extent) the CG shouldn't be too conspicuous.
The End of An Era: a Konami Without Kojima.
A God has to ascend to heaven eventually.