In certain comic arcs, Oliver Queen's fate includes his death. But it's important to note that comic storylines can be complex and sometimes characters come back or alternate timelines exist.
One idea could be a story where Oliver Queen finds himself in Kara's universe by some sort of multiverse accident. He teams up with Kara to fight a common enemy that is causing chaos in both their worlds. Their different fighting styles, Oliver's more grounded archery and hand - to - hand combat and Kara's super - powered abilities, would make for an interesting dynamic in battles.
One great 'dark Oliver Queen fanfiction' is 'The Dark Archer's Legacy'. It delves deep into Oliver's darker side, exploring how his experiences on the island could have made him more morally ambiguous. Another is 'Shadows of the Hood', which shows a more ruthless Oliver in his crime - fighting activities, with a lot of complex character development.
Oliver Queen's demise in the comics was a combination of various factors. It involved a final stand against a powerful enemy and his unwavering commitment to justice, leading to his ultimate sacrifice.