Batman v Superman: Dawn of Justice introduced set up how many superheroes are living in the DC Extended Universe, but next year, Justice League will see many of these heroes officially teaming up. Following that movie's release, The Flash will follow Ezra Miller's Barry Allen adventuring on his own in early 2018, but he won't be alone. News just broke that he'll be joined by his fellow Justice League teammate, Cyborg.
While it's unclear exactly what his role in The Flash will be, Variety is reporting that Ray Fisher will reprise Cyborg during the Scarlet Speedster's solo movie, making this his third DCEU appearance. Cyborg's inclusion was hinted at earlier this year by producer Deborah Snyder, but now it seems like more of a sure thing. Both heroes were introduced via cameos in Batman v Superman: Dawn of Justice, and Flash briefly appeared earlier this year in Suicide Squad. Both heroes will be officially introduced next year when they join forces with Batman, Superman, Wonder Woman and Aquaman in Justice League. Cyborg is also set to lead his own movie in 2020.
With the DCEU only three movies deep yet, we haven't seen much of Cyborg, a.k.a. Victor Stone. Like his comic book counterpart, Victor was horribly injured in an accident, and out of desperation, his father, Silas Stone, used a Mother Box to repair his damaged body and turn him into half a machine. The video footage of this event (from Lex Luthor's metahuman files) cut out before this process was completed, but when moviegoers officially meet him in Justice League, Victor be ready to battle Steppenwolf and his Parademon forces as Cyborg. His abilities include super strength, forming advanced weaponry and being able to interface with almost every kind of machinery and computer system.
Cyborg appearing in The Flash is another way for the DCEU to establish connectivity between different areas of this world, but it's also not uncommon nowadays for certain superheroes to appear in another hero's solo adventure. For instance, the latter two Captain America movies featured Steve Rogers fighting alongside (or against, when it came to certain folks in Civil War) his fellow Avengers, and Hulk will participate next year in Thor: Ragnarok. Nevetheless, we'll have to wait and see whether Cyborg will assist Flash in battling the main antagonist or if they'll just be hanging out together, much like Cyborg and Shazam do in the recent Justice League comics.
Ray Fisher is the third actor to be added to The Flash. Aside from Ezra Miller reprising the eponymous protagonist, a.k.a. Central City forensic scientist Barry Allen, Kiersey Clemons will play Barry's love interest, Iris West. Dope director Rick Famuyiwa will helm the movie, inheriting the position from Seth Grahame-Smith, who will still be credited as the screenplay writer.
The Flash is scheduled to begin production early next year, and will race into theaters sometime in 2018.