He's being branded as JLU. They have spent considerable time/money trying to get ppl to consider him a leaguer and not a titan... so I'd be highly surprised if they did this.
If they pull cyborg last minute to position him on the titans and not the league, that means their movie roster of JL has zero diversity.
No way they are even in serious competetion with the Marvel film franchise which has heavily featured War Machine, Falcon, and Nick Fury (and now brings in Black Panther) if they dont even have a 6th stringer like Cyborg on the squad.
Putting a superhero team together with all white people... Thats just poor marketing in 2016.
And they cant really reposition Vixen cause she is already attached to something.
They could use a black Green Lantern or but thats basically it... cause the black leagures start getting real obscure after that... and they aren't about to give 'Mr Terrific' screen time next to Superman / Batman.
I agree, it'd be a bad look on multiple levels. Tho if they did do a titans film, I don't think Cyborg would be included. He's gonna be a Justice Leaguer regardless... so in that scenario he just wouldn't have a solo movie anymore. Which again would still be a bad look.
But they already messed up back when they made Cyborg the "consolation prize" b/c (IMO) they didn't want the black GL to take the spot of the white GL, which would've been the no brainer decision. So they instead kicked out Martian Manhunter for Cyborg so they could keep all their white characters on the team. But now that they realize Cyborg really aint what's hot in the streets.. and how Marvel is makin moves with Cage, Black Panther, Falcon, etc... now they thinkin about makin the GL film a buddy cop type thing with both white and black GLs and how they still haven't announced which GL will be the JL one.
So we'll see how they figure it out but it's their own fault if it's a rock and a hard place thing. John Stewart was the easy solution, the popular solution and in some ways the only acceptable solution (outside of like, black lightning or something lol) but they wanted to see if they could cut corners with Cyborg.