“Yeah, we do feel that way. At a certain point,
I’m sure we’ll write another letter this year that asks everyone to stay off the internet. I think this one has even more spoilers than the last one. This is a culture that wants everything now, and it’s getting worse. The world is connected via social media, and information travels within seconds. If you’ve been following along with this narrative for 10 years, you’re going to want to protect yourself. It’s best to go in clean. I encourage people to go opening weekend because I’m sure everything is going to hit the internet the moment the movie hits the screen.”
https://www.boxofficepro.com/avengers-endgame-joe-russo-mcu-interview/