Let's go revive Oliver queen aka the original green arrow before Armageddon happened and the earth needs him said the new green arrow.
Agreed said the other superheroes aka supergirl and the batwoman and white canary and black-lighting. So we better do it asap but there is no revived pit so we need a different Oliver queen from a different timeline said white canary.
Ok said the flash and let's do it, team!!