Mr. Terrific will join the cast of The CW's Arrow Season Four, producer Greg Berlanti announced today at the series' Comic-Con panel.
They didn't identify which of the various Mr. Terrific identities would be the one used on the series, although Michael Holt seems to be the most likely, since he's been the default Mr. Terrific for years and was championed by DC Entertainment Chief Creative Officer Geoff Johns.
Berlanti did reveal that the character will work with Felicity Smoak and will be gay.
He teased that Anarky will also join the show, although he said little else about the character.