With cameras now rolling on director Jon Watts' "Spider-Man: Homecoming," fans were hit with a flurry of casting announcements, from Peter Parker's classmates to secondary villains to -- well, we're not quite sure, yet.

Story and characters details about the Sony Pictures/Marvel Studios reboot have been so tightly guarded, you'd think it was a J.J. Abrams production. Even director Jon Watts is afraid to say anything, explaining, "There's a little sniper dot on me at all times, just in case. They'll hit me with a tranq dart."

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However, we've managed to piece together some details about the 2017 film, which will see "Captain America: Civil War" breakout star Tom Holland reprise his role as Peter Parker. Here's everything we know -- for now:

What's this movie about?



That's a very good question. The short answer is -- we don't really know. The (slightly) longer answer is that director Jon Watts has described "Spider-Man: Homecoming" as "a high school movie" with a "John Hughes sort of tone," which may help to explain the film's title.

Beyond that, expect the story to pick up on threads introduced in Marvel Studios' "Captain America: Civil War" -- to say nothing of the Marvel Comics source material -- with young Peter Parker struggling to balance the demands of high school with those of his newfound life as a superhero.

Marvel Studios? Doesn't Sony hold the Spider-Man rights?

Yes, Sony Pictures has controlled the film rights to the Spider-Man characters since 1999, resulting in the blockbuster Sam Raimi trilogy. While the studio's 2012 franchise reboot "The Amazing Spider-Man" was a financial and critical success, the 2014 sequel short in both areas. That film was initially intended to serve as the cornerstone of a new cinematic universe, complete with a sequel and spinoffs featuring Venom and the Sinister Six.

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However, in February 2015 Sony and Marvel announced that a new Spider-Man would be introduced in an unspecified Marvel Cinematic Universe release. It turned out to be "Captain America: Civil War," of course, ahead of a solo film co-produced by the two studios. Sony will own, finance and distribute the film, and retain final creative control.

"Sony has the ultimate authority," Sony Pictures Chairman Tim Rothman explained this just this week. "But we have deferred the creative lead to Marvel, because they know what they're doing."

It's an unusual arrangement, certainly. But Marvel and Sony have enjoyed a much closer relationship than, say, Marvel and Fox. After all, Marvel and parent company Disney control the merchandising and television rights for the wall-crawler.

Will the studios work together on any Spider-sequels?



It certainly looks that way. Sony's Tim Rothman recently praised the studios' relationship, affirming plans to collaborate further with each other on Spider-Man films. "It's been fantastic, our relationship with Marvel," he said.

Sony is also developing an animated Spider-Man film, written by "The LEGO Movie's" Phil Lord, but that's separate from the Marvel arrangement.

OK, so who's starring in "Spider-Man: Homecoming"?

Tom Holland of course reprises his role as Peter Parker from "Captain America: Civil War," joined by Marisa Tomei as Aunt May and Robert Downey Jr. as Tony Stark. From there, however, it gets a bit murky.

Disney Channel breakout star Zendaya is on board as Peter's classmate Michelle, with Laurra Harrier, Kenneth Choi, Martin Starr and Abraham Attah apparently playing faculty and students at Midtown School of Science and Technology.

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Oscar nominee Michael Keaton has been cast as the film's primary antagonist, widely believed to be the classic Spider-Man foe Vulture. Logan Marshall-Green ("Prometheus") and Bokeem Woodbine (FX's "Fargo") have been tapped as apparent secondary villains.

Also in the mix are Michael Barbieri -- whom Watts insists isn't playing a whitewashed version of "Ultimate Spider-Man's" Ganke Lee -- Donald Glover, Michael Mando, Tony Revolori, Isabella Amara, Jorge Lendeborg Jr. and J.J. Totah and Hannibal Buress.

It's certainly an ethnically diverse cast, which of course is no accident.

"Peter Parker goes to high school in Queens, and Queens is one of -- if not the -- most diverse places in the world," Watts explained. "So I just wanted it to reflect what that actually looks like."

Wait, three villains?

Yes, at least three. However, it's unclear whether Woodbine and Marshall-Green will be established Spider-Man villains or merely the Vulture's henchman. That is, if Keaton is indeed playing the Vulture...

Did they learn nothing from "Spider-Man 3"?

Or "The Amazing Spider-Man 2," for that matter. We'll see.