There is only one. And yes, that's him.
Frankly, I think he is the perfect person to have written the script. He is extraordinarily sensitive and this bodes well for the real story, the relationships between the men and their consorts during the war.
You can guarantee that he's written the screenplay with an eye to the original movie.
Unfortunately, though, it seems they've compromised on the dog's name, which was also the code word for a successful attack
Access to information that wasn't available (censorship) when the first film was made should also get an airing, if it's relevant.