If your Marvel movie isn't focused on Spider-Man or the Guardians of the Galaxy, then we haven't heard about it in recent weeks. But there are, in fact, plenty of Marvel Studios movies still in the pipeline after 2017 -- one of them being 2018's "Avengers: Infinity War." The first of two upcoming Avengers team films directed by Joe Russo and Anthony Russo ("Captain America: The Winter Soldier" and "Captain America: Civil War"), little is known about the sprawling Marvel team-up movie. We know that it will feature plenty of heroes, and that the film will probably have ties to the classic "Infinity Gauntlet" story, but the rest remains a mystery.

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Thanks to a video posted by the Russo brothers to their Facebook page, though, we now have a look at one of the film's props being made -- in a truly mesmerizing manner. The video features something from the upcoming film being created by machine. Can you figure out what it is?

It should come as no surprise that props are being built for the film right now. It was reported back in November that "Avengers: Infinity War" has maybe started filming down in Atlanta while no one was looking. An Atlanta-based photographer tweeted out some information, saying that filming began on "Infinity War" on November 7th -- and that's all he could reveal.

We do know that "Infinity War" will be a big deal -- so big that it might even include a fight between the Hulk and "Guardians of the Galaxy's" Groot. Nothing official has been stated, but "GOTG" star Vin Diesel sure seems to think that his CG tree is destined to take on the Jade Giant.

While talking to Screen Junkies News at Sao Paulo’s Comic Con Experience convention, Diesel said that without a doubt, Hulk and Groot are going to fight at some point in the future. “I know somewhere in the universe you’re going to see Groot and Hulk battle,” said Diesel. “You can write it [down] somewhere. You’re going to see that poster, Groot vs. Hulk.”

Opening May 4, 2018, “Avengers: Infinity War” features a sprawling ensemble cast that’s so far confirmed to include Robert Downey Jr., Mark Ruffalo, Chris Pratt, Jeremy Renner, Benedict Cumberbatch and Brie Larson, among others. The film will be followed by a fourth "Avengers" film on May 3, 2019.