Blockbuster films have a seemingly useful way to keep an audience in place for the credits with the inclusion of post-credits scenes. Originally used in standalone films like Ferris Bueller's Day Off or Airplane!, they really caught fire after Iron Man, as a way to tease the next film in the MCU.
Logan director James Mangold spoke at The 2018 Writers Guild Association Beyond Words Panel this week about his thoughts on post-credit scenes and he didn't hold back.
The idea of making a movie that would fucking embarrass me, that's part of the anesthetizing of this country or the world. That's further confirming what they already know and tying in with other fucking products and selling them the next movie while you're making this movie, and kind of all that shit that I find really fucking embarrassing. Like, that audiences are actually asking for scenes in end credits when those scenes were first developed for movies that suck, so they put something extra at the end to pick up the scores when the movie couldn't end right on its own fucking feet.
Mangold sees post-credits scenes as a stepping stone to sell the audience on the next entry in the series before even finishing the currently entry. He believes that audiences are now accustomed to these scenes and that they're expected.
Now we've actually gotten audiences addicted to a fucking bonus in the credits. It's fucking embarrassing. It means you couldn't land your fucking movie is what it means. Even if you got 100,000 Twitter addicts who are gambling on what fucking scene is going to happen after the fucking credits it's still cheating. It's just cheating, but there's all sorts of bad habits like that that fucking horrify me, man, that have become de rigueur in the way we make movies and I think the fear of being one of them that did that end then everyone's patting me on the back and I feel like shit inside because I know I cheated, is probably the greatest thing that scares the shit out of me.
Mangold previously included a post-credits scene in The Wolverine, which would eventually pay off in X-Men: Days of Future Past. It's safe to assume that he won't be including any post-credits scenes going forward though.