I had figured it was something like that, regarding actor scheduling and the new Commandos being characters from comics canon. And it does make sense that the guys we meet by name in the movie aren't all of them -- that's an awfully small group to pull off as many jobs as they did, and we only get snippets of most of the battles. Still, it would have been nice to have had more familiar faces, and I hope that, if they appear again, they're able to work more of the guys we already know into the story.