For those that need it: The best time to use the restroom during Avengers: Endgame (LIGHT spoiler)

[Mr. Snuffleupagus]

You'll be missing out on character development for the end of the film and also a decent scene involving Ant-Man, as others have said.

 

[Fliesen]

...Why would you leave at that scene? That's quite an important one to watch for character development.

Also if you need a bathroom break at the one hour mark, surely you need one at the two hour mark as well.

Click to shrink...

Nah, man, it's not "need to pee every hour", it's "won't make it the full 3 hours without peeing" so you might as well do your pee-break at the most convenient point.

And i disagree with you on the character development aspect... "I wanna. But i could also not. - But you should. - But i could just not. - But you really wanna, though. - Yeah but i could also not. - But how would you feel if you didn't?"

The scene's not all that crucial. That struggle is much more efficiently conveyed in scenes prior and after.

 

[Billfisto]

My major issue is that between the trailers and the endless car and bank commercials, movies start like forty minutes after the lights dim now.

I don't necessarily have to go to the bathroom, but it bugs me that I may have to go to the bathroom later, when something important is happening.

 

[LL_Decitrig]

My major issue is that between the trailers and the endless car and bank commercials, movies start like forty minutes after the lights dim now.

I don't necessarily have to go to the bathroom, but it bugs me that I may have to go to the bathroom later, when something important is happening.

Click to shrink...

You can ask the cinema when the show actually starts, and show up at that time.