Colton Haynes for Nightwing?
Technically it could happen as Colton Haynes playing Arsenal in Arrow is not a part of the DC cinematic universe, and the Nightwing movie could always be a standalone movie not connected to anything (similar to the Joaquin Phoenix Joker flick).
Colton Haynes took to Twitter to simply tweet out "#Nightwing" along with three "hugging face" emojies.
Perhaps it may mean that Colton Haynes has a role in the Nightwing movie and isn't playing Dick Grayson? Or it could be that Colton Haynes is excited for the Nightwing movie.
Nightwing director Chris McKay recently offered an update on the Nightwing movie in that the script should be finished soon.
"Hi! Some early VDay news: Nightwing script expected very soon. Working on rip-o-matic to show studio. This is going to be a LONG process. So don't expect casting news any time soon. We are taking our time. Expect big things from DC, Geoff Johns and WB team! Exciting year ahead!!" Chris McKay tweeted.