Ezra Miller is playing The Flash in the DC movies, and Grant Gustin plays The Flash on TV.
The two worlds are considered separate universes, but if you are a fan of The Flash, that's never stopped him before.
Season 2 of The Flash saw Grant Gustin as Barry Allen travelling to an alternate Earth where he met another version of himself.
Likewise, Ezra Miller teased racing The Flash last Summer, so anything is possible.
"I'm not avoiding [The Flash TV series]. I'm not avoiding it at all," Gustin told MTV back in July of 2015. "I think it's awesome. Yeah. I think it's awesome. And come on. We're The Flash. It's parallel universes. Grant Gustin is The Flash, and I'm The Flash. Don't you see it's the event horizon. We crossed it baby. Grant and I are chillin.' We're gonna have a race! It's going to be dope! Like Jay Garrick and Barry Allen back in the day! It's going to be dope!"
MTV caught up again with Ezra Miller this past week where the Justice League Flash teased racing Grant Gustin a second time.
“He’s a boss,” Miller said. “I can’t wait to see him, eye to eye, adrift in the Speed Force — our eyes will lock and, in that moment, we will both know the truth. What truth? I dare not say.”
Ezra Miller stars as Barry Allen and The Flash in "Justice League" which has a November 17, 2017 release. "The Flash" movie hits March 16, 2018 directed by Rick Famuyiwa. Grant Gustin returns for "The Flash" Season 3 this October on The CW.
Justice League trailer:
The Flash Season 3 trailer: