I always wanted to see Arnold and Stallone do a WW2 movie together. Stallone is an American and Arnold is a German with anti-Nazi sentiments who winds up working together with Stallone.
It's a true story, but the blurb from the book makes it sound like a pulp action novel:
"May 1945. Hitler is dead, and the Third Reich little more than smoking rubble. No GI wants to be the last man killed in action against the Germans. But for cigar-chewing, rough-talking, hard-drinking, hard-charging Captain Jack Lee and his men, there is one more mission: rescue fourteen prominent French prisoners held in an SS-guarded castle high in the Austrian Alps. It’s a dangerous mission, but Lee has help from a decorated German Wehrmacht officer and his men, who voluntarily join the fight."
I don't know who could do the roles justice now. Sly and Arnold can still make good action pics, but people might not buy them as active officers in WW2.
Sly could maybe pull it off as he's just done Rambo 5. They'd have to be high ranking officers if it was to be done though. Some hands on Generals or Colonels.
Not if they're fed-up Germans willing to fight the Nazis. Remember, not all Germans were Nazis or supported the Nazis; similar to the way not all modern Americans are liberal fascists or support liberal fascism.