In response to a fan question on Twitter, he is apparently already working on a black and white edition of the film. Whether this means he is actually figuring out the conversion or trying to persuade 20th Century Fox of its validity, it is certainly more concrete when the actual director of the film says he is pushing for it.
Workin' on it.— Mangold (@mang0ld) March 1, 2017
And Logan, which stalks into cinemas today in the UK and on Friday in the US, seems ripe for the black and white. Given the beautiful photography Mangold has tweeted during and after shooting, and the movie's more mournful, serious tone, we can certainly see it working in monochrome.
Of course, there is nothing official yet, so we will have to wait and see whether it comes to pass. Claws crossed?