It’s also worth noting that the idea bears a ton of similarity to the famous Tower of Babel storyline, in which Batman’s secret plans for taking down every member of the Justice League fell into the hands of Ra’s Al Ghul.
Green Arrow has essentially become The CW’s surrogate Batman, so it wouldn’t be surprising to see The Emerald Archer take The Dark Knight’s place.
After Stephen Amell’s answer, David Ramsey similarly chimed in to point out that such a plot thread could pave the way for a great crossover next year.
The heroes of the Arrow-verse have become incredibly cohesive unit over the course of the last few years, so driving a rift between Oliver and the superpowered members of the small screen DC world could represent incredibly fertile storytelling ground.