94 Votes in Poll
He teased his interest in returning for cameos
I don't really think he needs to be. They should talk about him, sure, but he doesn' tneed to be there in person. Having Diggle and Lyla would probably be enough - they've pratically crossed over with The Flash more than Oliver.
He is the spectre
@Doom727 No, he's not. He's dead and is in the Afterlife. He probably chose someone else to be the Spectre like Corrigan chose him.
He may have made himself a fragment in space time when he was rebuilding the universe
What do you think?