I remember reading an interview with J.J. Abrams during the writers' strike, when he was supposed to be working on Star Trek XI. Abrams said he was coming up with great lines every day that he couldn't use in the film, because the union was on strike, and that would count as working.
One of Marx's underlying principles for thinking capitalism is bad is that capitalism alienates workers from the product of their labor. They work for someone else on a project that belongs to someone else and don't own anything to do with their project. One of the nice features of some jobs in a capitalist system is that you can identify with your project. Moviemaking is one of those jobs. J.J. Abrams has written, produced, and directed quite a number of successful productions, including Mission Impossible III, Lost, and Star Trek XI. Sometimes a writer doesn't own the characters or the story, but the writer gets credited and gets royalties from how many copies sell. There's a kind of ownership that's there even if some corporation owns the rights to the franchise.
But when the writer's union strikes, and members of the union have to refrain from using some of their best ideas, they get alienated from their work in a way that I think does count as an anti-Marxian effect of the strike. Maybe what that particular union was fighting for on that particular occasion was so important that it would be worth it to most of their members to sacrifice that kind of thing, but it does seem to be an unfortunate sacrifice, and I'm sure the Star Trek film would have been better in small but noticeable ways if he'd been able to use all those ideas.