Who knew in 1989 that so many people would care so much about Oct. 21 in 2015?

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That’s the future date that Marty McFly traveled to in Back to the Future II. Now that we’re about to reach that day (and the human race hasn’t been annihilated by nuclear weapons, killer bees, Ebola, or zombies), we only have scant precious hours to look at it as a place of unending possibilities. Because after Wednesday, as Reddit user by ask_if_im_pikachu posted in the Shower Thoughts community, Marty’s potential future will now become our set-in-stone past given our present perspective.

RELATED: Should Doc Brown Throw Out the First Pitch for the Cubs’ Game on ‘Back to Future’ Day?

And that realization, as PoonBandit pointed out in the comments, can be rather disturbing and sobering:

Another disturbing and sobering realization about Oct. 21: Everyone with a wagon is trying to hook it to the continuing popularity of that film’s 26-year-old star.

If Back to the Future II—or any of the films from the trilogy—still has a warm spot in your heart, then you’ll probably want to know about at least one of these eight things that will be happening Wednesday, Oct. 21, in connection with the movie franchise.

The only thing we don’t know: What’s Huey Lewis doing Wednesday?

1. Back to the Future Marathon

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Pretend it’s 1985 (and then 1989 and 1990) by rewatching the Back to the Future trilogy in the theater. Select movie theater chains will be running all three films back-to-back-to-back. Don’t live near a select theater? Or your schedule isn’t flexible enough to accommodate the showtimes? No worries. Amazon Prime is streaming the films. But if you’d rather watch them on a larger screen and you don’t have a set box, two new Back to the Future Blu-ray sets—the 30th anniversary edition and the “Complete Adventures” edition, which includes the 26-episode animated series, a visual history book and a light-up flux capacitor—will be released Tuesday.

2. Back in Time Documentary

Want to dig deeper into the Back to the Future phenomenon? Have a burning desire to know more about Eric Stoltz as Marty McFly? Then you’ll want to check out this documentary that will be available on DVD/Blu-ray, Netflix and video on demand Wednesday. Back in Time also will premiere on the big screen in Los Angeles that day before it heads out on the road Nov. 3 for 15 screenings in 13 cities across the country.

3. Back to the Future Comic Book Series

Screenwriter Bob Gale returns to writing the characters that made him never again have to worry about springing for an extra topping on his pizza. This time, though, it’s in comic book form thanks to a new four-part series from IDW, subtitled “Untold Tales and Alternate Timelines.” The first issue hits comic book stores Wednesday, and it’s doubtful one of those alternate timelines mentioned in the subtitle is Abhed’s darkest timeline.

4. DeLorean in Rocket League

The popular PS4 racing game will make the famous time-traveling vehicle available as a Battle-Car starting Wednesday. The DeLorean will run you $1.99, and it will even feature the fold-in jet wheels that allowed the car to fly.

5. Pepsi Perfect

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Better make sure your Wi-Fi connection is strong Wednesday if you want to snag this Back to the Future limited-edition collectible. The soft drink company will be selling online only 6,500 bottles of Pepsi Perfect, the fictional beverage from Back to the Future II. On the outside, the bottle will be shaped to resemble its appearance from the movie. On the inside, it’ll be filled with Pepsi sweetened with sugar, which seems rather retro given that Pepsi has marketed those sodas in the real world as “throwback” products.

6. A Flux Capacitor in Your Ford

Sure, you’ve been eyeing a 2016 Ford for sometime now, but there’s been one thing stopping you from pulling the trigger on a purchase: It’s got no flux capacitor. Well, that excuse won’t hold water between Wednesday and Oct. 26. That’s when you’ll be able to go to Ford’s car customizing page on its website and add the mechanism that makes automobile time travel possible to the dash of Fiesta or Focus. Technically, you won’t be able to purchase a vehicle with a flux capacitor—as the fine print on the YouTube video states: “Obviously, this upgrade is not actually available. Happy Back to the Future Day!”—but you will be able to see a mock-up of what it would look like and know that the time you’ve spent online doing so wasn’t wasted frivolously.

7. Back to the Future Toyota Commercial

Speaking of cars, Toyota, which recently released a brief Back to the Future-themed spot with Christopher Lloyd and Michael J. Fox, will air the full five-minute commercial on its website Wednesday. What’s the ad selling besides nostalgia and pop culture hook? It’s new Mirai, which runs on a hydrogen fuel cell.

8. Game 4 of the NLCS: Cubs vs. Mets

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Technically, there are no Back to the Future-related events connected with this game (yet). But if the Chicago Cubs have any hope of keeping alive the BttF2‘s prediction that they’ll win the World Series this year, they need a victory in Wednesday’s game at Wrigley Field. As of Monday, the New York Mets lead the National League Championship Series 2-0.

RELATED: If the Cubs Win the World Series, Vegas Loses Big

So what will we do in a post-Oct. 21, 2015, world? Look ahead to 2017, which is batshit scary if you’ve ever seen a certain 1987 film, as Reddit user Rambo_Brit3 posted in the Funny community.

Rambo_Brit3/Universal Pictures/TriStar Pictures