Maybe the most interesting moment in last weekend's Justice League trailer was a subtle hint about the wider DC Extended Universe.
The obvious focus was on Batman (Ben Affleck), Wonder Woman (Gal Gadot), Cyborg (Ray Fisher), Aquaman (Jason Momoa) and The Flash (Ezra Miller) banding together to fend off an invasion by the alien general Steppenwolf (Ciarán Hinds).
However, there were some very interesting Easter eggs about what's to come after Justice League, specifically a possible confirmation of a major Flash villain.
One brief scene shows Barry Allen (Miller) visiting his father Dr Henry Allen (Billy Crudup), who is very clearly behind bars… although we're not told why.
What we can guess - thanks to DC Comics lore - is that Dr Allen has been falsely convicted of murdering his wife Nora Allen.
This tiny scene is significant because in the comics, Nora's actual murderer is one of her son The Flash's greatest enemies - a time travelling speedster known as Eobard Thawne (aka Professor Zoom).
What to Read Next
Professor Zoom is also frequently referred to as the Reverse-Flash because he possesses similar powers to Barry Allen, but is bent on murdering Barry's mother in order to spawn the fractured Flashpoint continuity.
Fans of The Flash TV series - which is not connected to DC's movies - have seen Tom Cavanagh and Matt Letscher both play the shape-shifting Eobard Thawne at different times throughout the show's history.
While this nod to comics lore isn't definitive proof that the Reverse-Flash will end up in Ezra Miller's solo Flash movie down the road, it's at least a very strong hint in that direction.
The Flash is still in a state of flux, since it recently lost its second director. Filmmaker Rick Famuyiwa quit the movie last autumn over creative differences, months after Seth Grahame-Smith also dropped out as writer-director.
The latest reports have The Flash's screenplay being completely rewritten by Joby Harold, who has worked on Edge of Tomorrow and the upcoming King Arthur: Legend of the Sword.
However, it remains one of the projects still in contention for a 2018 release date along with Gotham City Sirens, Green Lantern Corps, Suicide Squad 2 and the Justice League Dark movie.
For now, you can catch The Flash when Justice League is unleashed in cinemas on November 17.
Want up-to-the-minute entertainment news and features? Just hit 'Like' on our Digital Spy Facebook page and 'Follow' on our @digitalspy Twitter account and you're all set.
Justin is a freelance entertainment journalist and writer. He first joined Digital Spy as a freelance entertainment reporter in 2010 and also worked as a sub-editor for the brand, serving as Night News Editor from 2016 to 2024. Over more than a decade, Justin has covered numerous major entertainment events from the US and has interviewed a wide-ranging group of public figures, from comedian Steve Coogan to icons from the Star Trek universe, cast members from the Marvel Cinematic Universe and reality stars from numerous Real Housewives cities and the Below Deck franchise. Justin has also been on the ground to cover major pop culture events like the Star Wars Celebration and the D23 Expo. He's written for titles across the Hearst network, plus the likes of CBR and Us Weekly.
