I’m preparing for the highs and lows of fan fervor this weekend when “Avengers: Infinity War” tears through cinemas. I’m carefully avoiding spoilers and scouring for a screening that hasn’t already sold out.

But theaters across the country are already scrambling to schedule more showings to accommodate the crowds. According to Fandango, more than 1,000 screenings of “Infinity War” have already sold out across the United States.

CNN reported that one New York theater is even adding a 3:05 a.m. screening for the most desperate fans.

“Big movies often sell out in theaters on opening weekend, but having over 1,000 showings sell out a week before release is a giant feat,” according to a Tuesday article on cinemablend.com. “Big movies in the States typically open on more than 3,000 screens, and “Infinity War” is a big movie among big movies. It’s anticipated to open in 4,200 theaters across the country.”

I’m impressed by the numbers, but I can’t say I’m surprised. This roughly 150-minute, approximately $300-million juggernaut features nearly every fan-favorite character Marvel Studios has brought to the theaters in the last 10 years.

Fans are going to see Thor and Tony Stark — played by Chris Hemsworth and Robert Downey Jr., respectively — paired up with the “Guardians of the Galaxy,” “Black Panther” and all of the other characters that have made this trendsetting cinematic universe worth nearly $6 billion in box office revenue.

I remember seeing “Iron Man” for the first time back when I was a high-school comic book nerd in 2008. I didn’t even realize post-credits scenes were a thing until someone at school told me the next day that actor Samuel L. Jackson had a cameo after the movie credits stopped rolling.

I saw it again and sat in my seat until Jackson showed up in all of his Nick Fury-glory and said to Stark, “I’m here to talk to you about the Avenger Initiative,” kick-starting a seemingly endless series of broken box office records, with “Infinity War” as the 19th movie in this decade-long crossover.

Wednesday was the film’s overseas debut, and reviews are already positive, with a Rotten Tomatoes score of 87-percent as of early Wednesday evening. But it’s such a pop-culture force that no poor review can stop it at this point. I simply want good writing in these new character pairings and some awesome set pieces, and everything points to this movie having plenty of both.

Good luck to everyone else heading into the crowds this weekend to catch a showing, and please, no spoilers.