After the Emerald Archer sacrificed himself to bring the Justice League back to the DC Universe in Dark Crisis on Infinite Earths, Oliver Queen is about to make his big return.

Source: https://www.cbr.com/green-arrow-joshua-williamson-sean-izaakse-interview/

But they'd better hurry—the stranded Oliver Queen and another lost member of the Green Arrow family are both being hunted by a brand-new villain called…Troublemaker.

Source: https://bleedingcool.com/comics/green-arrow-2-preview-search-party-pooper/

Over the course of its eight seasons, pitted Oliver Queen against several high-profile foes pulled from the pages of DC Comics.

Source: https://www.cbr.com/arrows-main-villains-ranked/

Stephen Amell’s Oliver Queen is not the only Arrowverse character returning for season 9, although most of the names already confirmed were part of ’s cast at some point.

Source: https://screenrant.com/stephen-amell-arrowverse-return-avoid-the-flash-problem/

This includes the reveal that actor Charlie Hunnam was once asked if he'd be interested in playing Oliver Queen, the Emerald Archer himself.

Source: https://screenrant.com/dc-green-arrow-movie-casting-charlie-hunnam-role/

When Oliver Queen does make his DCU debut, one underrated villain that he should definitely go up against is Danny Brickwell, a.k.a. Brick, a ruthless crime lord with impenetrable skin.

Source: https://www.cbr.com/gotg-actors-who-should-play-certain-characters-in-james-gunn-dcu/

While Oliver Queen was eventually resurrected, Connor was left alone in the world with even his title taken from him.

Source: https://www.cbr.com/dc-comics-superheroes-always-in-crisis/