Fast-forward to now, a fan found a Justice League promotional picture featuring Silas next to an unnamed Asian scientist, and Zack Snyder confirmed on Vero that this was Ryan, played by Star Wars: The Last Jedi’s Orion Lee.
However, this scene was ultimately one of many cut during the post-production/reshoots phase once Joss Whedon came aboard to finish Justice League.
Whether or not Ryan would have actually been referred to by name is unclear, but Snyder definitely intended for him to exist in this continuity.
Earlier this year, eagle-eyed fans noticed when re-watching Justice League that Ryan Choi’s name was displayed on the side of a computer screen, revealing that in the DC Extended Universe that Ryan is an employee at S.T.A.R. Labs.